Which of the following is most like the currently
accepted model of an atom?
a. A solid ball
b. An onion
c. A peach
d. A cloud
Dalton thought that atoms are most like
a. Smooth hard balls
b. Chocolate chip cookies
c. Onions with many layers
d. Peaches with a solid pit
What particles of the atom are found in the
nucleus?
a. Protons and neutrons
b. The middle
c. Electrons and protons
d. Electron cloud
How many protons does a Krypton atom have?
a. 18
b. 36
c. 72
d. 83.8
Atoms are electrically neutral because they have
a. Equal numbers of protons and neutrons
b. Equal numbers of electrons and neutrons
c. Equal numbers of protons and electrons
d. No charged particles
What is the atomic mass of Krypton?
a. 18
b. 36
c. 119.8
d. 83.8
What is the fewest number of atoms that can form a
compound?
a. 1
b. 2
c. 3
d. 4
As you move from Group 1 to Group 18 on the periodic
table
a. The elements go from highly reactive to non-reactive
b. The elements are mixed up
c. The elements go from non-reactive to highly reactive
d. The elements are in alphabetical order
A combination of two or more atoms that act as a single
unit is called
a. An element
b. A compound
c. A molecule
d. A solution
The chemical formula for sulfuric acid is H2SO4. Which of
the following best describes sulfuric acid?
a. An element made up of atoms
b. A compound made of elements
c. A mixture made up of elements
d. A mixture made up of compounds
Answer Key
1. D/A
2. A/B
3. C/D
4. B/A
5. C/B