Elements, Molecules and Compounds

Front

Oxygen, Nitrogen, Hydrogen, and Calcium are all examples of ______________________.

Back

elements

Front

Какое из следующих является соединением? NaCl, O2, Водород, He2

Back

NaCl

Front

Два атома азота связаны друг с другом. Они образуют...

Back

молекулу

Front

Как мы называем вещество, состоящее из одного атома?

Back

элемент

Front

Сколько атомов кислорода содержится в углекислом газе (CO2)?

Back

2

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

What is a compound?

Back

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

Front

What is the smallest unit of an element?

Back

An atom.

Front

What is the difference between an element and a compound?

Back

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

Front

What is the chemical formula for water?

Back

H2O.