Physical Science Midterm Review Guide

Front

In the scientific method, what is the term for a factor that is kept the same throughout an experiment?

Back

Constant

Front

Identify the variable being measured for Liters (L).

Back

Volume

Front

Fill in the blank: A mixture that has a uniform composition throughout is called a ________ mixture.

Back

Homogeneous

Front

What is an Anion?

Back

Negatively charged ion

Front

A Neutral Oxygen-15 atom has ___ protons, ___ neutrons, and ___ electrons.

Back

8 protons, 7 neutrons, and 8 electrons.

Front

How many valence electrons make an atom stable?

Back

8

Front

What is the formula for Beryllium fluoride?

Back

BeF2

Front

Which of the following reactions is a combustion reaction? C2H6 + O2 → CO2 + H2O, NH3 + H2(SO4) → (NH4)2(SO4), F2 + N2 → NF3, KClO3 → KCl + O2

Back

C2H6 + O2 → CO2 + H2O

Front

F2 + N2 → NF3. What is the reaction type?

Back

Combination

Front

What is the importance of the law of conservation of mass in balancing chemical equations?

Back

It ensures mass is conserved.