Energy Transfer

The periods (rows) of the Periodic Table represent the _____ of an element.

• mass number
• atomic number
• number of electron shells
• valence electrons

Tags

NGSS.HS-PS1-1

If Ca and Cl are bonded, the molecule formed will be _____.

• calcium chloride

  CaCl

• calcium dichloride CaCl3

• calcium chlorate Ca(ClO3)2

• calcium chloride

  CaCl2

Tags

NGSS.MS-PS1-1

Atomic radius on the periodic table _____.

• decreases down a group and increases across a period
• remains constant down a group and across a period
• increases down a group and decreases across a period
• increases across a period and remains constant down a group

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The ionization energy trend on the periodic table is _____.

• decreases across a period and increases down a group
• remains constant across a period and down a group
• increases down a group and decreases across a period
• increases across a period and decreases down a group

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Ionic Bonds _____ electrons.

• share
• transfer
• lose
• gain

An atom has a mass number of 9 and atomic number 4. The number of protons are_________.

• 4
• 6
• 3
• 5

Tags

NGSS.MS-PS1-1

An endothermic reaction _____ energy.

• absorbs
• destroys
• neutralizes
• releases

Tags

NGSS.HS-PS1-4

Which of the following statements is true about electrons?

• Electrons have a positive charge.
• Electrons have a negative charge.
• Electrons are larger than protons.
• Electrons are found in the nucleus of an atom.

An exothermic reaction _____ energy.

• releases
• conserves
• neutralizes
• absorbs

Tags

NGSS.HS-PS1-4

What type of reaction is shown on the energy diagram?

• endothermic reaction
• exothermic reaction
• oxidation reaction

• redox reaction

Tags

NGSS.HS-PS1-4