Atomic Theory

Atoms are made up of smaller particles called subatomic particles. Which is a large subatomic particle that has no charge?

• electron

• neutron

• nucleus

• proton

Every atom has a center called the nucleus. The nucleus has a positive charge. Which particles are found in the nucleus?

• neutron only

• protons only

• electrons and protons

• neutrons and protons

A scientist is examining two atoms. One has a nucleus with five protons and five neutrons surrounded by five electrons. The other has a nucleus with five protons and six neutrons surrounded by five electrons. What can the scientist conclude about these two atoms?

• They have different charge.

• They are the same element.

• They are not made of matter.

• They cannot form compounds.

Tags

NGSS.MS-PS1-1

Samir drew two atoms as shown in the following illustration. Which statement is true?

• They are atoms of two different elements.

• They are both atoms of the same element.

• Atom 1 has a positive charge, and Atom 2 has a negative charge.

• Atom 2 has a positive charge, and Atom 1 has a negative charge.

Tags

NGSS.MS-PS1-1

The following table describes four different atoms. Which is true?

• Each atom is a different element.

• Only atom 3 and 4 are the same element.

• Atom 3 is a different element from all the others.

• Atom 4 is a different element from all the others.

Tags

NGSS.MS-PS1-1

Which subatomic particle are far from the nucleus so they can be gained or lost?

• proton

• electron

• neutron

• both proton and neutron

Tags

NGSS.MS-PS1-5

This is a type of matter that is made of just one kind of atom.

• atomic theory

• compound

• proton

• element

When two or more atoms joined together chemically, they formed .....

• molecule

• atomic theory

• neutron

• boron

Tags

NGSS.MS-PS1-1

This is a substance formed by atoms from two or more elements.

• molecule

• compound

• atom

• element

Tags

NGSS.MS-PS1-1

All of these are examples of compound except ......

• Water

• Salt

• Fructose

• Silver

Tags

NGSS.MS-PS1-1