All Things Science

Atomic Structure

Atoms and Molecules

What is Atomic Structure?

All atoms are made of three parts known as protons, neutrons and electrons. Everything is made from an atom. An atom is a tiny particle that cannot be seen by the eye. A special microscope must be used to see it. An atom has four basic parts: a nucleus, protons, neutrons, and electrons. The protons and neutrons and neutrons stick together in the center called the nucleus. The electrons move around outside the nucleus. Atoms are constantly moving. Two or more atoms can combine to form a molecule.

Multiple Choice

What is the center of an atoms called?

• circle

• nucleus

• proton

• electrons

Fill in the Blanks

The proton, neutron and electron in an atom is called _______ ________.

Multiple Select

These two parts stick together and combine in the nucleus.

• protons

• electrons

• neutrons

• molecule

Multiple Select

When two or more atoms combine they form a ________.

• hydrogen

• DNA

• molecule

Multiple Choice

What are the parts of an atom?

• protons, neutrons, and electrons

• molecule, electrons, protons

A Star Turns Inside Out

We are star stuff.

Multiple Select

We are made of these two elements______ and ________.

• beryllium

• oxygen

• silicon

• carbon

Multiple Choice

What happens after a supernova?

• turns grey and collapses

• becomes a super giant

• it spreads elements that can form life to different galaxies

Multiple Choice

How many years ago did the stars form?

• 100 million years

• 1,300 years

• 13 billion years

Multiple Select

What were the three elements present at the beginning if the new universe?

• oxygen

• hydrogen

• helium

• lithium