WorksheetsAtomic Theory Quiz
Total questions: 20
Worksheet time: 10mins
Smallest piece of an element that is capable of independent existence.
Molecule
Formula Unit
Ion
Atom
Atoms of the same element with different numbers of neutrons.
Formula Unit
Isotopes
Isomers
Protons
How many neutrons are there in an atom of Lithium-7?
4
3
7
10
What is the name for the total number of protons in the nucleus of an atom?
Atomic Number
Mass Number
Isotope Number
Average Atomic Mass
What is the name for the total of all of the protons and neutrons in the nucleus of an atom?
Atomic Number
Isotope Number
Mass Number
Average Atomic Mass
How many protons are in an atom of Calcium?
40
40.08
20
There are no protons in calcium
How many electrons are there in an atom of Sodium-23
11
12
23
34
Which of the following IS a part of Dalton's Atomic Theory?
Atoms are made up of protons and neutrons.
Electrons are lost or gained during chemical changes
Atoms are indivisible
Atoms are positively charged
What is the mass number of Copper-63?
29
63
34
92
This scientist discovered the nucleus of an atom.
Dalton
Democritus
Mendeleev
Rutherford
Which of the following is a reason why Rutherford concluded that the nucleus is positive?
Most of the alpha particles missed the nucleus
Most of the alpha particles hit the nucleus
The alpha particles bounced off of the nucleus
The alpha particles stuck to the nucleus
How many neutrons are in an atom of Gold - 195?
79
116
195
274
Which of the following is the "standard" when determining the relative mass of an element?
Carbon-12
Carbon-14
Oxygen-16
Hydrogen-1
What is the name for a positive ion?
Cation
Anion
Electron
Polyatomic Ion
Which of the following CANNOT be found on the periodic table?
Atomic Number
Average Atomic Mass
Element Symbol
Mass Number
Which of the following is a metal?
Calcium
Hydrogen
Nitrogen
Carbon
Which of the following is a halogen?
Sodium
Barium
Iodine
Krypton
Which of the following elements has an octet?
Iodine
Sodium
Copper
Krypton
Which of the following is the alkaline earth metal in period 2?
Beryllium
Magnesium
Barium
Strontium
Which of the following has 50 protons in the nucleus?
Calcium
Gold
Tin
Lead
