Chemistry Semester assessment

What is the name of group number 1?

• halogens

• noble gases

• alkali metals

• alkaline earth metals

What is the name of group number 2?

• transition metals

• halogens

• metaloids

• alkaline earth metals

Valence electrons are

• the electrons in the outer most energy level

• all the electrons in the atom

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The number of valence electrons ________ by 1 as you move across the period.

• increases

• decreases

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What are the rows referred to on the Periodic Table of Elements?

• Families or groups

• Periods

Which element has the highest electronegativity?

• Fluorine (F)

• Iodine (I)

• Bromine (Br)

• Chlorine (Cl)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

An atom becomes _________ when it gains electrons.

• Positive
• Negative
• Neutral
• Invinsible

Cations are...

• Positive
• Negative
• Neutral
• Purring

Tags

NGSS.HS-PS1-3

An atom with 2 protons, 3 neutrons, and 4 electrons has a charge of ____.

• +2

• -2

• +3

• 0

What is the charge of an atom that has lost one electron?

• -1
• -2
• +1
• +2

Tags

NGSS.HS-PS1-7