Chemistry final review

Which of the following are halogens

Cl, Br, I, F

Which of the following elements is misspelled

thalium

Isoelectronic refers to species that

have identical electron configurations

A single orbital may, at most, contain

2 electrons

The element from group 2 and period 4 is

calcium

Which of the following is not a metalloid?

technetium

The atomic weight listed for an element on the periodic table is

an average of the weights of naturally-occurring isotopes

If a 250. g gold bar (specific heat: 0.031 cal/g·°C) absorbs 300. cal, how much will its temperature increase

39°C

Suppose 500. cal is absorbed by each of the following metals. Which has the greatest temperature increase?

gold: 100 g, with specific heat = 0.031 cal/g·°C
brass: 100 g, with specific heat = 0.089 cal/g·°C
copper: 200 g, with specific heat = 0.091 cal/g·°C
stainless steel: 300 g, with specific heat = 0.122 cal/g·°C

gold

A student measured the mass of 5 mL of a liquid to be 120.0 g. What is the density of the liquid (with
proper attention to the number of significant figures)?

20 g/cm 3

Which of the following contains 78 neutrons?

131-I

The electron configurations that permit maximum stability are those with

noble gas configurations

The most stable aluminum ion is

Al3+

Which of the following denotes an excited state of an uncharged carbon atom?

1s 2 2s 2 3s 2

Which neutral element has the following electron configuration:
[Ne]3s²3p4

S

Arrange the following electromagnetic radiation in order of increasing energy.
I: blue light II: microwaves III: infrared IV: yellow light

II < III < IV < I

Ba²⁺ is isoelectronic with

Xenon

Phosphorus forms the stable monatomic ion:

P3-

Strontium forms the stable monatomic ion:

Sr2+

Which of the following is the most electronegative element?

F

Magnesium cyanide has the formula:

Mg(CN)2

Chromium (II) nitrate has the formula

Cr(NO3)2

The ionic compound formed from calcium ion and the phosphate ion has the formula:

Ca3(PO4)2

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4.6

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131/54 Xe

18/8 O

218/84 Po

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