The atomic number ALWAYS equals the number of protons neutrons electons

Describe the trend in electronegativity of the elements ?

dalvyx [7]

Answer:

On the periodic table, electronegativity generally increases as you move from left to right across a period and decreases as you move down a group. As a result, the most electronegative elements are found on the top right of the periodic table, while the least electronegative elements are found on the bottom left.

Explanation:

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4 0

3 years ago

Coal contains _______ energy. A) light B) kinetic C) chemical D) mechanical

ololo11 [35]

C chemical since it is after all made of chemicals

3 0

3 years ago

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Isomers of hydrocarbons have the same _______formula but different ____formula.

Misha Larkins [42]

Answer:

Isomers of hydrocarbons have the molecular formula but structural formula.

Explanation:

Molecules with the same structural formula, but different molecular geometries (spatial arrangement) are called isomers. These differences in the arrangement of the various atoms confer certain differences in chemical properties to the resulting hydrocarbons, even though their chemical composition is the same. There are two types of isomers:

Structural isomers: Here, each atom are connected or bonded in different ways, hence structural isomers may contain different functional groups or pattern of bonding. structural isomers are further divided into: chain, position, and functional group isomers.

Stereoisomers: Here, the connections of the atoms are the same, but the difference is in their orientation in space

6 0

4 years ago

When two moles of ethane react completely with oxygen, how many moles of carbon dioxide will be produced?A. 2.B. 4.C. 8.D. Unkno

babymother [125]

Answer:

Option B.

Explanation:

As any reaction of combustion, the O₂ is a reactant and the products are CO₂ and H₂O. Combustion reaction for ethane is:

2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O

So 2 moles of ethane react with 7 moles of oxygen to make 4 moles of dioxide and 6 moles of water.

Then 2 moles of ethane will produce 4 moles of CO₂

6 0

3 years ago

The following image is of a diatom. It lives in water and gets food from photosynthesis. It is encased in a hard shell made of s

Serga [27]

the correct answer is A

A diatom is a(n) Singled-celled organism because it has only one cell.

(study island)

7 0

3 years ago