Chemistry Midterm Review

Which compound has both ionic and covalent bonds?

• CH₄

• CO

• CaCl₂

• MgSO₄

As the elements in Group 2 in the periodic table are considered in order of increasing atomic number, there is a general increase in

• stability

• atomic radius

• electronegativity

• first ionization energy

Which pair of atoms will form ionic bonds?

• S and F

• Mg and O

• F and Cl

• H and Ne

Under which conditions does a gas behave least like an ideal gas?

• high temperature and low pressure

• high temperature and high pressure

• low temperature and low pressure

• low temperature and high pressure

Which particle has a mass so small, it is considered to be 0 amu?

• proton

• hydrogen nucleus

• neutron

• electron

When iron is mixed with sulfur, the iron

• becomes a covalent compound

• retains its magnetic properties

• loses its magnetic properties

• transfers its magnetic properties to sulfur

According to the scale, which of these substances is the strongest base?

• NaOH

• HCl

• Bleach

• Lemon Juice

The molecules of a substance are moving rapidly in a container. The molecules do not interact with each other. If the container is opened, the molecules will escape from the container. In what phase of matter are the molecules in the container?

• plasma

• gas

• liquid

• solid

Which of the following allows a solute to dissolve faster? Check all that apply.

• Crushing the cube increases surface area

• Stirring the cube will dissolve it faster

• Adding hot water will dissolve it faster

• Adding cold water will dissolve it faster

Tags

NGSS.MS-PS3-4

Based on the solubility chart, which of the listed salts is the most soluble at 25 °C?

• potassium iodide

• sodium chloride

• potassium nitrate

• potassium chlorate

Tags

NGSS.MS-PS1-4