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muminat
3 years ago
13

Is helium a homogeneous or heterogeneous mixture or compound or element?

Chemistry
1 answer:
sattari [20]3 years ago
8 0
Helium is a chemical ELEMENT of the family of noble gases. Its chemical symbol is 'He' which has an atomic number of 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Although it doesn't really react under normal conditions, it is the second most abundant element in the universe.

Elements are pure substances that cannot be broken down any further.
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Which of the following best describes the difference in bonding between two hydrogen atoms and two carbon atoms?
valentinak56 [21]

Answer :

2. Hydrogen forms bonds through the overlap of 1s atomic orbitals and the sharing of electrons between atoms. Carbon forms bonds through the overlapping of sp hybrid atomic orbitals and the sharing of electrons between carbon atoms.

Explanation:

The H-H bond is formed by the overlap of two 1s orbitals and the sharing of electrons between the two atoms.

A carbon atom must use the overlap of hybridized atomic orbitals and the sharing of electrons to bond with another carbon atoms.

1. is <em>wrong</em> because H can use only its <em>1s orbital</em> for bonding.

3. is <em>wrong</em> because C must <em>share electrons</em> to form a carbon-carbon bond.

4. is <em>wrong</em> because <em>C does NOT use overlapping of 2s orbitals</em> for bonding. It uses the overlap of hybridized orbitals.

5. is <em>wrong</em> because H must <em>share electrons</em> to form an H-H bond.

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3 years ago
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B it is an aldose to ketose isomerization
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4 years ago
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8 0
4 years ago
Where does crude oil come from
telo118 [61]

<em>Question : Where does crude oil come from?</em>

<em>So firstly Crude oil is a fossil fuel and,is know and called implies, Over time the fossils the remains of vegetation and various organisms, and bacteria and algae, are covered by an increasing amount of soil before they are converted through heat and pressure into matter composed largely of hydrocarbons.</em>

<em>Hopefully that helps you ! have a good day !</em>

5 0
4 years ago
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