Organization of matter

substance that cannot be split into simple substances

• compound

• element

Combination of 2 or more elements

• compound

• element

The center of an atom

• nucleus

• center

Inside of the nucleus we can find

• protons and neutrons

• electrons and protons

• neutrons and electrons

outside of the nucleus we can find

• protons

• neutrons

• electrons

Particles that have a positive charge

• protons

• neutrons

• electrons

Particles with no charge

• neutrons

• electrons

• protons

Particles with negative charge

• electrons

• neutrons

• protons

Between metals and non-metals, which group is bigger?

• metals

• non-metals

Number of protons and neutrons of an element

• atomic number

• protons number

• element number