LG03 - Reactivity and the Periodic Table

What determines the identity of an atom?

• number of protons

• number of electrons

• number of neutrons

• number of valence electrons

Tags

NGSS.MS-PS1-1

The particles in an atom that are neutral are called __________.

• negatrons

• electrons

• neutrons

• protons

Protons have a _____ charge while electrons have a _____ charge.

• positive; negative
• negative; positive
• neutral; positive
• negative; neutral

If a neutral atom has 3 electrons, how many protons does it have?

• 7

• 6

• 4

• 3

An atom will be neutral if the number of protons is equal to the number of _____.

• protons

• neutrons

• electrons

• octets

Identify number 14 on the periodic table square below.

• atomic mass

• chemical symbol

• atomic number

• element name

Tags

NGSS.MS-PS1-1

How many protons does an atom with an atomic number of 6 have?

• 6

• 12

• 3

• cannot be determined

What charge will an atom have if it loses 2 electrons?

• +2
• -2
• 0
• +1

Tags

NGSS.HS-PS1-7

What charge will an atom have if it gains one electron?

• -1
• +1
• 1

Tags

NGSS.HS-PS1-7

Identify number 16 on the periodic table square below.

• atomic number

• element name

• atomic mass

• chemical symbol