Physical Science Mid-Term Test (Units 1 - 3)

The atomic number of an atom is defined as which of the following?

• mass in amu

• number of electrons

• mass in grams

• number of protons

Using a periodic table, what is the average atomic mass of cobalt (Co)?

• 40.08 amu

• 52.00 amu

• 58.93 amu

• 65.55 amu

What is the charge of an electron?

• -2

• -1

• 0

• +1

Tags

NGSS.MS-PS2-3

Arsenic is a metalloid. Which statement best describes arsenic?

• Arsenic is similar to a nonmetal because it is a gas at room temperature and similar to a metal because it is not malleable.

• Arsenic is similar to a nonmetal because it is brittle and similar to a metal because it conducts heat and electricity well.

• Arsenic is only similar to a metal because it is not ductile and is a gas at room temperature.

• Arsenic is only similar to a nonmetal because it is a good conductor and is reflective.

Due to the number of valence electrons, which type of atom would a Group 1 element bond with in a 1:1 ratio?

• argon

• oxygen

• carbon

• fluorine

What is the most important factor in determining how an atom will bond?

• the number of protons the atom has

• the number of neutrons the atom has

• the number of isotopes of the atom that exist

• the number of electrons in the atom's outermost energy level

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The chemical properties of calcium are most similar to the chemical properties of

• Ar

• K

• Sc

• Mg

Which element has chemical properties that are MOST similar to those of calcium?

• Ar

• K

• Sc

• Mg

Which sequence of atomic numbers represents elements that have similar chemical properties?

• 3, 12, 21, 40

• 4, 20, 38, 88

• 9, 16, 33, 50

• 19, 23, 30, 36

What is the overall charge of the compound sodium chloride?

• +1

• +2

• 0

• -1