Reviewing Atoms and the Periodic Table

What is the number at the top of the box called?

• atomic number

• mass number

• atomic weight

• valence electrons

Tags

NGSS.HS-PS1-1

What does the number at the top of the box tell you about the atom?

• The number of neutrons

• The number of protons and neutrons

• Then number of energy levels

• The number of protons

Tags

NGSS.MS-PS1-1

What is the number at the bottom of the box called?

• atomic number

• mass number

• valence electron

• energy levels

What does the number at the bottom of the box tell you?

• The number of protons in the nucleus

• The number of protons and neutrons in the nucleus

• The number of protons and electrons in the nucleus

• The number of electrons in the nucleus

When taking the test what should you always do to the mass number?

• Nothing. Leave it in the decimal form

• Round it to the nearest integer

• Divide it by the atomic number.

• Add it to the atomic number.

Tags

NGSS.MS-PS1-1

How do you use the periodic table to find the number of neutrons in the flourine atom?

• 9 + 19

• 9 - 19

• 19 - 9

• 19 / 9

Answer explanation

Mass number - Atomic number

Tags

NGSS.MS-PS1-1

How many protons, neutrons, and electrons are in an atom of magnesium?

• 12p, 12e, 24n

• 24p, 24e, 36n

• 12p, 12e, 12n

• 24p, 12e, 24n

Answer explanation

Atomic number = 12 so

p = 12

e = 12

Mass # - Atomic # = n

24 - 12. = 12

Tags

NGSS.MS-PS1-1

What is the highest number of valence electrons an atom can have?

• 4

• 6

• 8

• 10

Tags

NGSS.HS-PS1-1

What part of the atom determines its chemical properties and reactivity?

• protons

• neutrons

• electrons

• valence electrons

• nucleus

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What part of the atom determines its identity?

• protons

• neutrons

• electrons

• valence electrons

Tags

NGSS.MS-PS1-1