Atomic Structure

Vocabulary

Multiple Choice

Calculations

Periodic Table

Random

100

A positively charged subatomic particle is called a

Proton

100

Elements are composed of:

A. molecules

B. neutrons

C. atoms

D. compounds

C. atoms

100

Find the number of protons for sodium (Na)

100

Which elements symbol is Mg

magnesium

100

Mass number of carbon

12.01

200

Positively charged mass at the center of an atom

nucleus

200

Accounts for over 99% of the atom's mass

A. electrons

B. protons

C. neutrons

D. nucleus

200

Find the number of protons, neutrons and electrons in Hafnium

Protons = 72

Electrons = 72

Neutrons = 106

200

Element on the periodic table with 34 protons

sulfur

200

Atomic number for Sulfur

300

Identifies an element and is equal to the number of protons in the nucleus

atomic number

300

Max number of electrons the fourth level can hold

A. 16

B. 64

C. 100

D. 32

300

How many valence electrons does magnesium have?

300

What element has 74 neutrons (when in a normal, neutral state)

Iodine

300

Number of neutrons in Br-78

400

Versions of the same element with different numbers of neutrons

isotopes

400

An ion that loses electrons is called a

A. ion

B. atomic ion

C. anion

D. cation

400

If Aluminum has a charge of +3, how many protons, neutrons and electrons does it have?

Protons = 13

Neutrons = 14

Electrons = 10

400

The variable used for atomic number is _. The variable used for mass number is _.

Atomic number = Z

Mass number = A

400

Number of protons, neutrons and electrons in Pb+4

Protons = 82

Electrons = 78

Neutrons = 125

500

A visual model showing the most likely locations for the electrons in an atom

Electron cloud

500

The octet rule states that _ valence electrons make an atom stable

A. 2

B. 4

C. 6

D. 8

500

Calculate (show your work) the number of neutrons in potassium-43

Neutrons = 23

500

How many different groups are in the periodic table?

18 groups

500

What element has 110 neutrons (in a normal state, not charged)

Tungsten