Elements, formulas, and subscripts

Front

What are elements?

Back

Elements are pure substances that cannot be broken down into simpler substances and are represented by chemical symbols.

Front

How many atoms of oxygen are in the formula CaCO3?

Back

There are 3 atoms of oxygen in the formula CaCO3.

Front

What is a characteristic property of metals?

Back

Metals are ductile, meaning they can be drawn into wires.

Front

What are compounds?

Back

Compounds are pure substances formed when two or more elements chemically combine, represented by a chemical formula.

Front

What do we call the vertical columns in the periodic table?

Back

The vertical columns in the periodic table are called groups or families.

Front

What is a chemical symbol?

Back

A chemical symbol is a one or two-letter notation used to represent an element.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What does the subscript in a chemical formula indicate?

Back

The subscript in a chemical formula indicates the number of atoms of the element present in the compound.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O, which means it contains 2 hydrogen atoms and 1 oxygen atom.

Front

What are the horizontal rows in the periodic table called?

Back

The horizontal rows in the periodic table are called periods.