Question

period chemistry worksheet name

1. give the chemical symbol for each of the following ele - ments.

a. bromine c. mercury e. fluorine
b. bismuth d. vanadium f. calcium

1. give the chemical symbol for each of the following ele - ments.

a. silver c. cadmium e. tin
b. aluminum d. antimony f. arsenic

1. for the following processes that show the formation of ions, fill in the number of electrons that must be lost or gained to complete the process.

a. sr→sr²⁺+______e⁻
b. se +______e⁻→se²⁻
c. fe→fe²⁺+______e⁻
d. p+______e⁻→p³⁻
e. br+______e⁻→br⁻
f. au→au³⁺+______e⁻

1. form the ionic compounds from the given anions and cations.

anions cations
fe²⁺ al³⁺ hg²⁺ nh₄⁺ na⁺
oh⁻
cl⁻
so₄⁻
po₄⁻³

Explanation:

Step1: Find chemical symbols

Refer to the periodic - table.
a. Bromine: Br; c. Mercury: Hg; e. Fluorine: F; h. Bismuth: Bi; a. Silver: Ag; c. Cadmium: Cd; e. Tin: Sn; h. Aluminum: Al; d. Antimony: Sb; f. Arsenic: As

Step2: Determine electron - loss or gain in ion formation

Use the charge on the ion.
a. Sr→Sr²⁺ + 2e⁻; b. Se+ 2e⁻→Se²⁻; c. Fe→Fe²⁺ + 2e⁻; d. P + 3e⁻→P³⁻; e. Br+e⁻→Br⁻; f. Au→Au³⁺ + 3e⁻

Step3: Form ionic compounds

Balance the charges.

• With OH⁻: Fe(OH)₂, Al(OH)₃, Hg(OH)₂, NH₄OH, NaOH
• With Cl⁻: FeCl₂, AlCl₃, HgCl₂, NH₄Cl, NaCl
• With SO₄²⁻: FeSO₄, Al₂(SO₄)₃, HgSO₄, (NH₄)₂SO₄, Na₂SO₄
• With PO₄³⁻: Fe₃(PO₄)₂, AlPO₄, Hg₃(PO₄)₂, (NH₄)₃PO₄, Na₃PO₄

Answer:

1. a. Br; c. Hg; e. F; h. Bi
2. a. Ag; c. Cd; e. Sn; h. Al; d. Sb; f. As
3. a. 2; b. 2; c. 2; d. 3; e. 1; f. 3
4. With OH⁻: Fe(OH)₂, Al(OH)₃, Hg(OH)₂, NH₄OH, NaOH

With Cl⁻: FeCl₂, AlCl₃, HgCl₂, NH₄Cl, NaCl
With SO₄²⁻: FeSO₄, Al₂(SO₄)₃, HgSO₄, (NH₄)₂SO₄, Na₂SO₄
With PO₄³⁻: Fe₃(PO₄)₂, AlPO₄, Hg₃(PO₄)₂, (NH₄)₃PO₄, Na₃PO₄