Counting Atoms and Periodic Table

ALL atoms of this element have the same number of _________.

• Electrons

• Protons

• Electrons + protons

Tags

NGSS.MS-PS1-1

Oxygen has an atomic number of 8. How many valence electrons will oxygen have?

• 2

• 4

• 6

• 8

What particle(s) determine the mass of an atom?

• protons and neutrons

• protons and electrons

• protons only

• neutrons and electrons

Carbon has a mass number of 13 and an atomic number of 6. Which of the following is true?

• the # of protons is 13

• the # of neutrons is 13

• the # of protons is 6

• the # of neutrons is 6

A Nickel atom has an atomic mass of 59. Its atomic number is 28. How many neutrons does the nickel atom have?

• 30

• 28

• 31

• 59

Tags

NGSS.MS-PS1-1

Atoms with similar chemical properties are most likely located...

• in the same period.

• in the same group.

• in different periods.

• to the right and left of each other.

Each element is unique based on its number of protons, also known as the...

• atomic mass

• valence number

• atomic symbol

• atomic number

An element's identity is determined by the number of

• electrons.

• protons.

• neutrons.

• valence.

Rows on the period table are called _____ while columns are called _____.

• groups, families

• groups, periods

• periods, groups

• families, groups

When making a Bohr model of aluminum sulfate, Al₂(SO₄)₃, what combination of beads should be used for that model?

• 2 blue, 3, yellow, 12 green

• 6 blue, 12 yellow, 12 green

• 2 blue, 1 yellow, 4 green

Tags

NGSS.MS-PS1-1