Chemistry Midterm Review

In Bohr's model of the atom, where are the electrons and protons located?

• The electrons occupy fixed positions around the protons, which are at the center of the atom.

• The electrons and protons move throughout the atom.

• The electrons and protons are located throughout the atom, but they are not free to move.

• The electrons move around the protons, which are at the center of the atom.

Wavelength and Frequency are directly proportional.

• True

• False

Tags

NGSS.HS-PS4-1

An endothermic process releases heat.

• True

• False

Tags

NGSS.MS-PS1-4

What would likely happen if you were to touch the flask in which an endothermic reaction was occurring?

• The flask would probably feel cooler than before the reaction started.

• The flask would feel the same as before the reaction started.

• The flask would probably feel warmer than before the reaction started.

• none of the above

Tags

NGSS.MS-PS1-4

What is the polarity of HCN?

• Hydrogen bonding

• polar

• nonpolar

• dipole-dipole

Which is the best description of electromagnetic radiation?

• electricity

• heat

• matter

• plasma

• energy

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

An example of an extensive property of matter is ____.

• pressure

• hardness

• mass

• temperature

Why are atoms electrically neutral?

• They contain equal numbers of protons and neutrons.

• They contain more neutrons than protons.

• They contain more electrons than protons.

• They contain equal numbers of protons and electrons.

Most metals are NOT:

• ductile

• malleable

• good conductors

• liquid at room temperature

Which state of matter is characterized by having a definite shape and a definite volume?

• solid

• liquid

• gas

• plasma