Q2 Physical Science Benchmark

Front

What does it mean for an equation to be balanced?

Back

A balanced equation has the same number of each type of atom on both sides, indicating that mass is conserved in a chemical reaction.

Front

How many different elements are in sodium sulfate (Na2SO4)?

Back

Sodium sulfate is made of 3 different elements: sodium (Na), sulfur (S), and oxygen (O).

Front

What is a substance that tastes sour, turns blue litmus paper red, and has a pH value less than 7?

Back

This substance is called an acid.

Front

What type of bonds are formed between non-metals?

Back

Covalent bonds are formed between non-metals.

Front

What are the elements located along the staircase on the periodic table called?

Back

The elements along the staircase are called metalloids.

Front

What is the pH range of acids?

Back

The pH range of acids is less than 7.

Front

What is the definition of a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together.

Front

What is the difference between metals and non-metals?

Back

Metals are typically shiny, good conductors of heat and electricity, while non-metals are dull and poor conductors.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What is the significance of the coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in a reaction.