How many electrons can occupy the shell having n = 2?
2
6
18
8
The property defined as the energy released on adding an electron to an isolated gas phase atom is _____.
electron affinity
atomic number
ionizatino energy
electronegativity
When the prefix milli is used in the metric or SI system, a fundamental unit of measurement is multiplied by what factor?
10^-6
10^6
10^-3
10^3
An atom containing 47 protons, 47 electrons, and 60 neutrons has a mass number of __.
60
94
107
47
What is the total length of two pieces of rubber tubing which are 7.69 cm and 4.028 cm in length? Express this answer to the correct number of significant figures.
11.72 cm
12 cm
11.7 cm
11.718 cm
95.0°F is the same as:
85°C
35°C
21°C
171°C
Main group elements that are metals usually ________ one or more electrons to form ________, which have a ________ charge.
gain; anions; negative
gain; cations; positive
lose; cations; positive
lose; anions; negative
If 75.0 g of water at 30.0°C absorbs 900 calories, the new temperature will be:
42.0°C
22.0°C
18.0°C
105°C
The volume of a gas sample is recorded as 0.0970 L. How many significant figures is this?
3
5
2
4
An atom with Z = 26 and A = 58 contains ________ protons and ________ neutrons.
58; 26
26; 32
32; 26
26; 58
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