CP Unit 3 Review

Periodic Table

100

Write the element symbols for the following: 

Aluminum, Calcium, and Beryllium

Al 

Ca

Be

200

A horizontal ROW on the periodic table is called a _______, while a vertical COLUMN is called a _________. 

period, group

300

Describe the location of metals, nonmetals, and metalloids relative to the stairstep line. 

Metals - left

Nonmetals - right

metalloids - on

400

Group 18 elements are called the ___________. 

Group 2 elements are called the ____________. 

noble gases; alkaline earth metals

500

Representative (or main group) elements belong to groups _______. (List all the group #'s that belong to this category!!)

1, 2, 13-18

Atom - Basic

100

What subatomic particle(s) are in the nucleus? 

protons and neutrons

200

Which subatomic particle has a charge of -1 and a negligible mass? 

electron

300

What is another name for the number of protons in an atom? 

Atomic Number

400

Which subatomic particle(s) determine the mass of an atom? 

Protons and neutrons only

500

Are all atoms of a given element identical? Explain. 

No, there may be isotopes (different numbers of neutrons)

Isotopes

100

What is an isotope symbol? Write the generic symbol for it

^A_ZX^c

200

How is mass number calculated? 

Mass number (A) is # protons plus # neutrons

300

What are the TWO conditions that must be true in order for two atoms to be isotopes? 

1. same number of protons

2. different number of neutrons (different mass number)

400

Are these isotopes? Explain

carbon-14 and nitrogen-14

no, different elements

500

Write the isotope symbol for an atom with 9 protons, 10 neutrons, and 10 electrons

¹⁹₉F^-

Isotopes - Advanced

100

Write the isotope symbol for sulfur-32. It has gained two electrons. 

Hint: use the equation charge = (# protons) - (# electrons) to determine charge

³²₁₆S^2-

200

If an atom is neutral, what is true about its number of protons and electrons? 

equal in number

300

In naturally occurring rubidium, 72.17% is rubidium-85 with a mass of 84.91 amu. 27.83% is rubidium-87 with a mass of 86.91 amu. Calculate the atomic mass for rubidium using the weighted average mass methods.

85.47 amu

400

Write the isotope symbol for a neutral atom with 20 protons and 20 neutrons. 

⁴⁰₂₀Ca

500

Explain why this method of calculating the atomic mass of boron is incorrect. Boron has two isotopes: boron-10 and boron-11: 

(10.01+11.01)/2

Does not account for percent abundance of each isotope

Misc

100

What is the atomic number of titanium? 

Z=22

200

What is the mass number for an atom of arsenic that has 42 neutrons?  

75

300

List three properties of metals

shiny, conductive of heat and electricity, malleable, ductile, high melting points 

400

Is aluminum a metal, nonmetal, or metalloid? 

metal 

500

List the other group name for each group # below, if applicable: 

Ex: group 1 = group 1A

14 = ___

18 = ___

4 =   ___

4A

8A

4 (no other names)