Compounds and Chemical Reactions - Test Review

Which pair of atoms can form an ionic bond?

• Aluminum (Al) and Potassium (K)

• Cesium (Cs) and Fluorine (F)

• Fluorine (F) and Sulfur (S)

• Sodium (Na) and Radon (Rn)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following describes what happens when an atom becomes an ion with a -3 charge?

• the atom gains 3 protons

• the atom loses 3 protons

• the atom gains 3 electrons

• the atom loses 3 electrons

Balancing a chemical equation so that the same number of atoms of each element is found in both the reactants and the products is an illustration

• activation energy

• the law of conservation of energy

• the law of conservation of mass

• a double-replacement reaction

Tags

NGSS.MS-PS1-5

In which type of reaction do two atoms switch places?

• synthesis

• decomposition

• single-replacement

• double-replacement

Which of the following usually increases the rate of a reaction?

• decreasing the concentration of the reactants

• adding an inhibitor

• lowering the temperature of the reactants

• raising the temperature of the reactants

Tags

NGSS.HS-PS1-5

___ are formed by atoms losing electrons

• Negative ions

• Position ions

• Elements

• Compounds

A catalyst

• slows the rate of a reaction

• increases the energy given off by a reaction

• speeds up the rate of a reaction

• is permanently changed when used in a reaction

Tags

NGSS.HS-PS1-5

H₂O is considered a compound. Which method would allow you to separate Hydrogen from Oxygen?

• Evaporation

• Boiling

• Chemical Reaction

• Physical Reaction

Tags

NGSS.MS-PS1-2

An atom is considered to be __ when its outer shell of electrons is full

• stable

• balanced

• noble

• crystal

What type of bond is holding the compound H₂O together?

• Ionic

• Covalent

• Double Bond

• Magnetic Bond