Number Of Electrons In Calcium

The Number Of Electrons In Calcium
Number Of Electrons In Calcium 40

Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on. The general formula is that the nth shell can in principle hold up to 2(n 2) electrons. Yes, calcium is defined as a metal because of both its physical and chemical traits. They all have an outer shell with two electrons and are very reactive. Those elements in the second column have two electrons ready to make compounds. It shouldn't surprise you that calcium has a valence of 2. You won't find calcium sitting around as a pure.

A. The number of valence electrons in aluminum is

1) 1e^– 2) 2e^– 3) 3e^–

Each electron in an atom has a set of four quantum numbers which uniquely describe the “location” of that electron in terms of energy. For a calcium 2+ ion, there will be 18 sets of quantum numbers, not the usual 20 for a neutral atom. It will be missing the two electrons in the 4s sublevel. A calcium atom has 20 protons, 20 electrons and 20 neutrons. Calcium's atomic mass is 40.08 g/mole, which rounds to 40 g/mole. Calcium's atomic.

B. The change in electrons for octet requires a

1) loss of 3e^–2) gain of 3e^–3) gain of 5e^–

C. The ionic charge of aluminum is

1) 3^– 2) 5^– 3) 3⁺

D. The symbol for the aluminum ion is

1) Al³⁺ 2) Al^3- 3) Al⁺

Show Answer

A. The number of valence electrons in aluminum is

3) 3e^–

B. The change in electrons for octet requires a

1) loss of 3e^–

C. The ionic charge of aluminum is

3) 3⁺

D. The symbol for the aluminum ion is

1) Al³⁺

A. Number of valence electrons in sulfur is

1) 4e^– 2) 6e^– 3) 8e^–

B. Change in electrons for octet requires a

1) loss of 2e^–2) gain of 2e^–3) gain of 4e^–

C. Ionic charge of sulfur is

1) 2+ 2) 2- 3) 4-

Show Answer

A. Number of valence electrons in sulfur is

2) 6e^–

B. Change in electrons for octet requires a

2) gain of 2e^–

C. Ionic charge of sulfur is

2) 2-

3. Select the correct formula for each of the following ionic compounds

A. Na⁺and S^2-

1) NaS 2) Na₂S 3) NaS₂

B. Al³⁺and Cl^–

1) AlCl₃ 2) AlCl 3) Al₃Cl

C. Mg²⁺ and N^3-

1) MgN 2) Mg₂N₃ 3) Mg₃N₂

Show Answer

The Number Of Electrons In Calcium

A. Na⁺and S^2-

2) Na₂S

check: 2Na⁺ + S^2- = 2(1+) + 1(2-) = 0

B. Al³⁺and Cl^–

1) AlCl₃

check: Al³⁺ + 3Cl^– = (3+) + 3(1-) = 0

C. Mg²⁺and N^3-

3) Mg₃N₂

check: 3Mg²⁺ +2N^3- = 3(2+) + 2(3-) = 0

4. Complete the names of the following ions:

Ba²⁺Al³⁺ K⁺

_________ __________ _________

N³^– O²^– F^–

_________ __________ _________

P³^– S²^– Cl^–

_________ __________ __________

Show Answer

Ba²⁺Al³⁺ K⁺

barium aluminum potassium

N³^– O²^– F^–

nitride oxide fluoride

P³^– S²^– Cl^–

phosphide sulfide chloride

5. Write the names of the following compounds:

1) CaO ___________

2) KBr ___________

3) Al₂O₃ ___________

4) MgCl₂ ___________

Show Answer

Write the names of the following compounds:

1) CaO calcium oxide

2) KBr potassium bromide

3) Al₂O₃ aluminum oxide

4) MgCl₂ magnesium chloride

6. Select the correct name for each.

A. Fe₂S₃

1) iron sulfide

2) iron(II) sulfide

3) iron (III) sulfide

B. CuO

1) copper oxide

2) copper(I) oxide

3) copper (II) oxide

Show Answer

Select the correct name for each.

A. Fe₂S₃

3) iron (III) sulfide Fe³⁺S^2-

B. CuO

3) copper (II) oxide Cu²⁺O^2-

7. The correct formula for each of the following is:

A. Copper (I) nitride

1) CuN 2) CuN₃ 3) Cu₃N

B. Lead (IV) oxide

1) PbO₂ 2) PbO 3) Pb₂O₄

Show Answer

The correct formula is

A. Copper (I) nitride

3) Cu₃N 3Cu⁺ + N^3-= 3(1+) + (3-) = 0

B. Lead (IV) oxide

1) PbO₂ Pb⁴⁺ + 2O^2-= (4+) +2(2-) = 0

8. Match each formula with the correct name:

A. MgS 1) magnesium sulfite

MgSO₃ 2) magnesium sulfate

MgSO₄ 3) magnesium sulfide

B. Ca(ClO₃)₂ 1) calcium chlorate

CaCl₂ 2) calcium chlorite

Ca(ClO₂)₂3) calcium chloride

Show Answer

Match each formula with the correct name:

A. MgS 3) magnesium sulfide

MgSO₃ 1) magnesium sulfite

MgSO₄ 2) magnesium sulfate

B. Ca(ClO₃)₂ 1) calcium chlorate

CaCl₂ 3) calcium chloride

Ca(ClO₂)₂2) calcium chlorite

9. Name each of the following compounds:

A. Mg(NO₃)₂

B. Cu(ClO₃)₂

C. PbO₂

D. Fe₂(SO₄)₃

E. Ba₃(PO₃⁾₂

Show Answer

Name each of the following compounds:

A. Mg(NO₃)₂magnesium nitrate

B. Cu(ClO₃)₂copper(II) chlorate

C. PbO₂lead (IV) oxide

D. Fe₂(SO₄)₃iron(III) sulfate

E. Ba₃(PO₃)₂barium phosphite

10. Write the correct formula for each:

A. potassium bromate

B. calcium carbonate

C. sodium phosphate

D. iron(III) oxide

E. iron (II) nitrite

Show Answer

Write the correct formula for each:

A. potassium bromate KBrO₃

B. calcium carbonate CaCO₃

C. sodium phosphate Na₃PO₄

D. iron(III) oxide Fe₂O₃

E. iron (II) nitrite Fe(NO₂)₂

11. Name the following compounds:

A. Ca₃(PO₄)₂

B. FeBr₃

C. Al₂S₃

D. Zn(NO₂)₂

E. NaHCO₃

Show Answer

Name the following compounds:

A. Ca₃(PO₄)₂Ca²⁺ PO₄³⁻calcium phosphate

B. FeBr₃Fe³⁺ Br⁻iron(III) bromide

C. Al₂S₃Al³⁺ S²⁻aluminum sulfide

D. Zn(NO₂)₂Zn²⁺ NO₂⁻zinc nitrite

E. NaHCO₃Na⁺ HCO₃⁻sodium hydrogen carbonate

12. Write the formulas for the following:

A. calcium nitrate

B. iron(II) hydroxide

C. aluminum carbonate

D. copper(II) bromide

E. lithium phosphate

Show Answer

Write the formulas for the following:

A. calcium nitrate Ca²⁺, NO₃⁻ Ca(NO₃)₂

B. iron(II) hydroxide Fe²⁺, OH⁻ Fe(OH)₂

C. aluminum carbonate Al³⁺, CO₃²⁻ Al₂(CO₃)₃

D. copper(II) bromide Cu²⁺, Br⁻ CuBr₂

E. lithium phosphate Li⁺, PO₄³⁻ Li₃PO₄

13. Match each formula with the correct name:

A. MgS 1) magnesium sulfite

MgSO₃ 2) magnesium sulfate

MgSO₄ 3) magnesium sulfide

B. Ca(ClO₃)₂ 1) calcium chlorate

CaCl₂ 2) calcium chlorite

Ca(ClO₂)₂3) calcium chloride

Show Answer

Match each formula with the correct name:

A. MgS 3) magnesium sulfide

MgSO₃ 1) magnesium sulfite

MgSO₄ 2) magnesium sulfate

B. Ca(ClO₃)₂ 1) calcium chlorate

CaCl₂ 3) calcium chloride

Ca(ClO₂)₂2) calcium chlorite

14. Name each of the following compounds:

A. Mg(NO₃)₂

B. Cu(ClO₃)₂

C. PbO₂

D. Fe₂(SO₄)₃

E. Ba₃(PO₃⁾₂

Show Answer

Name each of the following compounds:

A. Mg(NO₃)₂magnesium nitrate

B. Cu(ClO₃)₂copper(II) chlorate

C. PbO₂lead (IV) oxide

D. Fe₂(SO₄)₃iron(III) sulfate

E. Ba₃(PO₃)₂barium phosphite

15. Select the correct formula for each:

A. aluminum nitrate

1) AlNO₃2) Al(NO)₃ 3) Al(NO₃)₃

B. copper(II) nitrate

1) CuNO₃ 2) Cu(NO₃)₂ 3) Cu₂(NO₃)

C. iron (III) hydroxide

1) FeOH 2) FeOH₃3) Fe(OH)₃

D. tin(IV) hydroxide

1) Sn(OH)₄ 2) Sn(OH)₂ 3) Sn₄(OH)

Show Answer

Select the correct formula for each:

A. aluminum nitrate

3) Al(NO₃)₃

B. copper(II) nitrate

2) Cu(NO₃)₂

C. iron(III) hydroxide

3) Fe(OH)₃

D. tin(IV) hydroxide

1) Sn(OH)₄

16. Write the correct formula for each:

A. potassium bromate

B. calcium carbonate