How does one determine the number of core electrons an atom has?

Chemistry

2 answers:

scoundrel [369]2 years ago

4 0

Answer: Subtract the number of valence electrons(outer most shell electrons) from the atomic number of an atom.

Explanation: The total number of electrons for an atom equals to its atomic number. Electrons are present in different shells. Electrons present in outer most shell(valence shell) are known as valence electrons and rest of the electrons present in inner shells are known as core electrons.

So, to determine the number of electrons we subtract the valence electrons from atomic number.

For example, atomic number of N (nitrogen) is 7. It has 5 valence electrons.

Number of core electrons for N = 7 - 5 = 2

Aleonysh [2.5K]2 years ago

3 0

Subtract the group number from the atomic number.

You might be interested in

Bond length is the distance between the centers of two bonded atoms. On the potential energy curve, the bond length is the inter

vredina [299]

Answer:

The answer is "152 pm".

Explanation:

The bond length from the values inside the atomic radii is calculated according to the query. This would be the upper limit of a molecule's binding length.

The atomic radius of $H= 37.0 \ pm$

The atomic radius of $Br = 115.0 \ pm$

$\text{Bond length = Atomic radius of H + Atomic radius of Br}$

$= 37.0\ pm + 115.0 \ pm\\\\= 152\ pm$

3 0

3 years ago

Biomes are defined by specific characteristics. What characteristics would define the biome shown? a. cool and windy with coarse

KIM [24]

Answer : Option D) Hot and dry with low growing shrubs.

Explanation : According to the attached image of the Biome, this particular biome displays the hot and dry climatic region along with low growing shrubs. A biomes are the way to divide the largely occurring flora and fauna in a particular place on the Earth's surface. These divisions are made on the basis of climatic patterns, soil types, and the animals and plants that are found to inhabit in that area.