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3 years ago

Which electrons in a calcium atom in the ground state have the greatest effect on the chemical properties of calcium

Chemistry

2 answers:

JulsSmile [24]3 years ago

6 0

Answer is: the two electrons in the fourth shell.

Atomic number of calcium is 20, it means that it has 20 protons and 20 electrons, so atom of calcium is neutral.

Electron configuration of calcium atom: ₂₀Ca 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²; calcium has two valence electrons (4s²).

In reactions it lose those two electrons ang form cation with positive charge 2+.

Atomic number is the number of protons, which is characteristic of a chemical element.

Beryllium, magnesium,calcium and strontium are alkaline earth metals. The elements have very similar properties.

Alkaline earth metals have in common an outer s- electron shell (two electrons).

liraira [26]3 years ago

5 0

<u>Valence electrons</u> have the greatest effect on the chemical properties of calcium

<h3>Further explanation</h3>

Electrons can move the shell up or down by releasing energy or absorbing energy

Excited electrons show higher electron transfer to the shell by absorbing energy

So it can be concluded that there are 2 conditions:

Ground state is the state of electrons filling skins with the lowest energy levels.

Excited state is the state of electrons which occupies a higher energy level

The state of excited electrons can be seen from the presence of electrons which do not fill the skin completely but fill the skin afterwards

Ca has atomic number 20 so the electron configuration is:

1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

This configuration can be said in Ground state conditions

Elemental properties can be determined by its valence electrons (electrons which fill electrons in the outer shell)

The valence electrons of an element indicate in what group and period the element is located in the periodic system so that its properties can be determined

The period of an element is determined from the valence shell (the biggest main quantum number (n) )

Groups of chemical elements are divided into two, namely:

Group A, occupying sub shell s and p

Group B, occupying sub shell d

If we look at valence electrons from Ca atoms then:

period = 4
group = 2A

So that the Ca Atom is located in the alkaline earth group, together with beryllium (Be), magnesium (Mg), strontium (Sr), barium (Ba), and radium (Ra)

So the chemical properties of calcium :

- forming bases
- reactive
- strong reducing agent

<h3>Learn more </h3>

element X

brainly.com/question/2572495

electrons and atomic orbitals

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about subatomic particles statement

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3 years ago

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1. What is the specific heat (C) of an unknown sample that weighs 5.0 grams, absorbds 250.0j of heat and has a temperature

maks197457 [2]

Note: The question is incomplete. The complete question is given below :
Suppose a substance has a heat of fusion equal to 45 cal/g and a specific heat of 0.75 cal/g°C in the liquid state. If 5.0 kcal of heat are applied to a 50 g sample of the substance at a temperature of 24°C, what will its new temperate be? What state will the sample be in? (melting point of the substance = 27°C; specific heat of the solid =0.48 cal/g°C; boiling point of the substance = 700°C)
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1.a) Heat energy required to raise the temperature of the substance to its melting point, H = mcΔT
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