compare
to examine the character or qualities of especially in order to discover resemblances or differences or to respresent as simillar
Contrast
to compare in order to show unlikeness or differences; note the opposite natures, purpose, etc of:
Bubble Maps
used to describe qualities using adjectives ("sparkle words") and adjectives phrases. As a writing tool it enriches students' abilities to identify qualities and use descriptive words. In the center circle, write the word or thing being described.
to examine the character or qualities of especially in order to discover resemblances or differences or to respresent as simillar
Contrast
to compare in order to show unlikeness or differences; note the opposite natures, purpose, etc of:
Bubble Maps
used to describe qualities using adjectives ("sparkle words") and adjectives phrases. As a writing tool it enriches students' abilities to identify qualities and use descriptive words. In the center circle, write the word or thing being described.
HYDROGEN
Hydrogen is the lightest element of the other elements and is the most abundant element in the universe.Hydrogen is a very useful element. Because hydrogen is used to make ammonia for fertilizers, distillation
metals, and methanol to make basic materials such as plastics.Hydrogen is also used as a rocket fuel in which liquid hydrogen is combined with liquid oxygen to produce a powerful explosion. Scientists hope that someday hydrogen can be used as a clean alternative fuel instead of gasoline.Hydrogen is the first element in the periodic table. Hodrogen is the simplest atom that consists of a single proton in a nucleus orbiting by a single electron.Characteristics and Properties of Hydrogen
Symbols: HAtomic Number: 1Atomic weight: 1.00794Classification: not metalsPhase at Room Temperature: GasDensity: 0.08988 g / L @ 0 ° CMelting point: -259.14 ° C, -434.45 ° FBoiling point: -252,87 ° C, -423,17 ° FDiscovered by: Henry Cavendish in 1766
At standard temperature and pressure, hydrogen is a gas that is colorless, odorless, and tasteless.Hydrogen is highly flammable and burns with invisible fire. Hydrogen will cause burns when it comes in contact with oxygen.The reaction product of hydrogen and oxygen is water or H2O. Hydrogen gas consists of diatomic molecules shown with the symbol H2.
The most common place to find hydrogen on earth is water. Each water molecule (H2O) contains two hydrogen atoms. Hydrogen is also found in various compounds throughout the earth including hydrocarbons, acids, and hydroxides.There is very little free hydrogen in the earth's atmosphere. Because very lightly hydrogen finally passes into space. The only free hydrogen on earth is deep underground.
Hydrogen is mostly found in stars and planets. The sun consists of mostly hydrogen. Deep in the sun, high pressure hydrogen atoms are converted into helium atoms. This conversion is called fusion and releases heat and energy that we see as sunlight.
British scientist Henry Cavendish discovered hydrogen as an element in 1766. Cavendish experimented with zinc and hydrochloric acid. He discovered hydrogen and also discovered that zinc and hydrochloric acid produce water when burned.
The name hydrogen comes from the Greek word "hydro" (meaning water) and "gene" (meaning creator). This is called by the French chemist Antoine Lavoisier because when a hydrogen burn "creates water".Ions and Isotopes
Hydrogen can be negatively charged and become an anion called hydride. But hydrogen can also be positively charged as a cation.
Protium is the most common isotope of hydrogen. It does not have neutrons and protons. Other common isotopes include deuterium and tritium.
Hydrogen is highly flammable. As you know, the Sun is one of the big fireballs. One element that makes the sun shine so bright is hydrogen.
Symbols: HAtomic Number: 1Atomic weight: 1.00794Classification: not metalsPhase at Room Temperature: GasDensity: 0.08988 g / L @ 0 ° CMelting point: -259.14 ° C, -434.45 ° FBoiling point: -252,87 ° C, -423,17 ° FDiscovered by: Henry Cavendish in 1766
At standard temperature and pressure, hydrogen is a gas that is colorless, odorless, and tasteless.Hydrogen is highly flammable and burns with invisible fire. Hydrogen will cause burns when it comes in contact with oxygen.The reaction product of hydrogen and oxygen is water or H2O. Hydrogen gas consists of diatomic molecules shown with the symbol H2.
The most common place to find hydrogen on earth is water. Each water molecule (H2O) contains two hydrogen atoms. Hydrogen is also found in various compounds throughout the earth including hydrocarbons, acids, and hydroxides.There is very little free hydrogen in the earth's atmosphere. Because very lightly hydrogen finally passes into space. The only free hydrogen on earth is deep underground.
Hydrogen is mostly found in stars and planets. The sun consists of mostly hydrogen. Deep in the sun, high pressure hydrogen atoms are converted into helium atoms. This conversion is called fusion and releases heat and energy that we see as sunlight.
British scientist Henry Cavendish discovered hydrogen as an element in 1766. Cavendish experimented with zinc and hydrochloric acid. He discovered hydrogen and also discovered that zinc and hydrochloric acid produce water when burned.
The name hydrogen comes from the Greek word "hydro" (meaning water) and "gene" (meaning creator). This is called by the French chemist Antoine Lavoisier because when a hydrogen burn "creates water".Ions and Isotopes
Hydrogen can be negatively charged and become an anion called hydride. But hydrogen can also be positively charged as a cation.
Protium is the most common isotope of hydrogen. It does not have neutrons and protons. Other common isotopes include deuterium and tritium.
Hydrogen is highly flammable. As you know, the Sun is one of the big fireballs. One element that makes the sun shine so bright is hydrogen.
HELIUM
Helium is the lightest element after hydrogen and is the second common element in the universe. Helium is at the top of the noble gas group in the periodic table.
Symbols: HeAtomic number: 2Atomic weight: 4.00260Classification: A noble and nonmetal gasPhase at Room Temperature: GasDensity: 0.1786 g / L @ 0 ° CMelting point: -272.20 ° C, -457.96 ° FBoiling point: -268.93 ° C, -452.07 ° FDiscovered by: Pierre Janssen in 1868
At room temperature helium is odorless, tasteless, and is a colorless gas. It has a very low boiling and melting point, which means that helium is commonly found in the gas phase except under the most extreme conditions. Helium is the only non-solid element under normal pressure and remains liquid even at zero.Helium is one of inert or noble gases. Means that its outer shell is full of electrons. This makes it extremely unreactive and non-flammable.Helium is quite rare on Earth. There is very little in the atmosphere of the earth because it is so light that it eventually escapes into space.
Scientists believe that most of the helium in the universe was created in the formation of the universe. However, new helium is made at the center of the star and also as part of radioactive decay on Earth. Helium from radioactive decay can be found underground trapped in natural gas reservoirs.Helium is constantly being produced in the internal core of stars. Deep within the star, intense pressure causes the hydrogen atom to be transformed into a helium atom. This creates energy, heat, and light which is the power of the stars and the sun. This conversion is called nuclear fusion.
Helium is used in balloons and air balloons to make them float. It is not shaped like light on hydrogen, but the gas is much safer than the highly flammable hydrogen.The largest industrial users of helium gas are used in MRI scanners that use gas to keep magnetic superconductors cool. Other applications include silicon wafers for electronics and as a protective gas for welding.
Helium was first discovered in 1868 by astronomer Pierre Janssen. He saw a new element when studying the solar eclipse. This element was not found on Earth until 1895.Helium gets its name from the Greek word "Helios" which means "sun". Helios is also the name of the Greek sun god.There are eight known isotopes in helium. The most abundant isotope of helium is Helium-4 which was largely made at the beginning of the universe.
Interesting Facts about Helium:The speed of sound in helium is about three times the speed of sound in the air. This causes the sound to get high-pitched and shrill when they inhale helium.Helium has never been observed by scientists for bonding with other elements in forming compounds.Helium is often mixed with oxygen in a scuba air tank to melt oxygen. It is used as a substitute for nitrogen because it will not dissolve in the blood and will leave the human body faster.In general, helium will not combine with itself to create molecules, but is found as a single atom.
Symbols: HeAtomic number: 2Atomic weight: 4.00260Classification: A noble and nonmetal gasPhase at Room Temperature: GasDensity: 0.1786 g / L @ 0 ° CMelting point: -272.20 ° C, -457.96 ° FBoiling point: -268.93 ° C, -452.07 ° FDiscovered by: Pierre Janssen in 1868
At room temperature helium is odorless, tasteless, and is a colorless gas. It has a very low boiling and melting point, which means that helium is commonly found in the gas phase except under the most extreme conditions. Helium is the only non-solid element under normal pressure and remains liquid even at zero.Helium is one of inert or noble gases. Means that its outer shell is full of electrons. This makes it extremely unreactive and non-flammable.Helium is quite rare on Earth. There is very little in the atmosphere of the earth because it is so light that it eventually escapes into space.
Scientists believe that most of the helium in the universe was created in the formation of the universe. However, new helium is made at the center of the star and also as part of radioactive decay on Earth. Helium from radioactive decay can be found underground trapped in natural gas reservoirs.Helium is constantly being produced in the internal core of stars. Deep within the star, intense pressure causes the hydrogen atom to be transformed into a helium atom. This creates energy, heat, and light which is the power of the stars and the sun. This conversion is called nuclear fusion.
Helium is used in balloons and air balloons to make them float. It is not shaped like light on hydrogen, but the gas is much safer than the highly flammable hydrogen.The largest industrial users of helium gas are used in MRI scanners that use gas to keep magnetic superconductors cool. Other applications include silicon wafers for electronics and as a protective gas for welding.
Helium was first discovered in 1868 by astronomer Pierre Janssen. He saw a new element when studying the solar eclipse. This element was not found on Earth until 1895.Helium gets its name from the Greek word "Helios" which means "sun". Helios is also the name of the Greek sun god.There are eight known isotopes in helium. The most abundant isotope of helium is Helium-4 which was largely made at the beginning of the universe.
Interesting Facts about Helium:The speed of sound in helium is about three times the speed of sound in the air. This causes the sound to get high-pitched and shrill when they inhale helium.Helium has never been observed by scientists for bonding with other elements in forming compounds.Helium is often mixed with oxygen in a scuba air tank to melt oxygen. It is used as a substitute for nitrogen because it will not dissolve in the blood and will leave the human body faster.In general, helium will not combine with itself to create molecules, but is found as a single atom.
Can explain to me , why H and He is colorless ?
BalasHapusHydrogen and helium are gaseous elements. Most of the gas is colorless. Except for F2, Cl2, and NO2. Dark brown in NO2 is sometimes seen in polluted air.
HapusWhat are the characteristics of hydrogen
BalasHapusThe following are the characteristics of the Hydrogen Chemical Elements:
HapusGroup 1
Period 1
Melting point -259.16 ° C, -434.49 ° F, 13.99 K
Boiling point -252,879 ° C, -423,182 ° F, 20,271 K
Block s
Density (g cm-3) 0,000082
Atomic number 1
Relatively atomic mass of 1.008
Conditions at 20 ° C
Gas Key isotope 1H, 2H
1s1 electron configuration
CAS number 133-74-0
ChemSpider ID 4515072
Hydrogen Physical Characteristics:
Hydrogen is colorless, odorless gas. This hydrogen has the lowest density of all gases.
"There is vey little in the atmospher" What caused it
BalasHapusThe cause of very little hydrogen and helium in the atmosphere is that these gases are the lightest gases
HapusHelium and hydrogen are very rare in the air except at elevations (elevations) are high.
What is the physical properties of the above elements? Whether corrosive, poisonous, or otherwise?
BalasHapusSome of the physical properties of hydrogen are in a natural state on Earth, hydrogen is a colorless substance, a highly flammable, non-toxic, odorless gas. Hydrogen is the lightest element known to exist in nature, seizing an average of 75% of all the mass in the universe in stars, planets, and other stars.
HapusSome physical properties of helium is this gas is the second lightest element after hydrogen. Helium is an odorless, tasteless, colorless, non-toxic gas. This gas is less soluble in water than other gases. Helium is a less reactive element and hardly forms a chemical compound with other elements.