Question

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1. name the compound zn(clo₃)₂.

a. zinc dichlorate
c. zinc chloríte
b. zinc chlorate
d. zinc perchlorate

1. the correct electron configuration for germanium (ge) is

a. 1s²2s²2p⁶3s²3p²
b. 1s²2s²2p⁶3s²3p⁶4s²4d¹⁰4p²
c. 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p²
d. 1s²2s²2p⁶3s²3p⁶4s²4p²

1. an element can be defined as:

a. a substance composed of a single type of atom that cannot be broken down.
b. a substance composed of multiple types of atoms that cannot be broken down.
c. a substance of 2 particles that has chemically bonded together that can be broken down.
d. a substance of 1 particle that has chemically bonded together that can be broken down.

1. which set of elements consists of a metal, nonmetal and metalloid respectively (in that order):

a. f, ge, ca
d. rb, sb, i
b. ag, o, br
e. n, as, kr
c. mg, s, si

1. the atomic mass of hydrogen is 1.008 g. the reason that this value is not a whole number is that...

a. hydrogen only exists as a diatomic molecule.
b. the mass of hydrogen is the sum of the masses of the protons and electrons in the atom.
c. the mass of hydrogen is the sum of the masses of the proton and neutrons in the atom.
d. hydrogen has more than one isotope, and the average mass is the weighted average of all isotopes of hydrogen.

1. what is the symbol of the element that has the following electron configuration? 1s²2s²2p⁶3s²3p⁵

a. cl
c. si
b. p
d. s

1. which equation is not balanced?

a. 2 h₂ + 1 o₂ → 2 h₂o
b. 1 h₂ + 1 o₂ → 1 h₂o₂
c. 1 h₂ + 1 h₂ + 1 o₂ → 1 h₂o + 1 h₂o
d. 2 h₂ + 1 o₂ → 1 h₂o

1. what is the name of sn₃(po₄)₄?

a. tin (ii) phosphate
c. tin (iii) phosphate
b. tin (iv) phosphate
d. tin (iv) phosphide

Explanation:

1. Q33: $\text{ClO}_3^-$ is the chlorate polyatomic ion. Zinc has a +2 charge, so the compound name matches the ion.
2. Q34: Germanium has an atomic number of 32. Follow the aufbau principle: fill lower energy orbitals first, with 3d filling before 4p.
3. Q35: An element is a pure substance made of only one type of atom that cannot be chemically broken further.
4. Q36: Mg is an alkaline earth metal, S is a nonmetal chalcogen, Si is a metalloid in group 14.
5. Q37: Atomic mass is the weighted average of all naturally occurring isotopes of an element. Hydrogen has protium, deuterium, and tritium isotopes.
6. Q38: The electron configuration sums to 17 electrons, matching chlorine's atomic number.
7. Q39: Option d has 4 H and 2 O on the reactant side, but only 2 H and 1 O on the product side, so it is unbalanced.
8. Q40: $\text{PO}_4^{3-}$ is phosphate. 3 tin ions balance 4 phosphate ions: $3x + 4(-3)=0$, so $x=+4$ for tin charge.

Answer:

1. b. Zinc chlorate
2. c. $1s^22s^22p^63s^23p^64s^23d^{10}4p^2$
3. a. a substance composed of a single type of atom that cannot be broken down.
4. c. Mg, S, Si
5. d. hydrogen has more than one isotope, and the average mass is the weighted average of all isotopes of hydrogen.
6. a. Cl
7. **d. $2 \text{ H}_2 + 1 \text{ O}_2

ightarrow 1 \text{ H}_2\text{O}$**

1. b. tin (IV) phosphate