Atomic Structure

What are the subatomic particles?

• Protons, Electrons, Neutrons

• Molecules, and atoms

• Electrons, Protons, Nucleus

• Nucleus, and Electrons

What is this subatomic particle that has positive charge?

• Electron

• Neutron

• Proton

• Megatron

What is the smallest unit of matter? It is composed of protons and neutrons, held together in the nucleus, and electrons around the nucleus in different electron orbitals, which form an electron cloud.

• cell

• nucleus

• atom

• electron

Tags

NGSS.MS-PS1-1

What mass does a neutron have?

• 1 amu

• 0 amu

• -1 amu

• +2 amu

Complete the missing label on the diagram.

• Neutron
• Centre
• Nucleus
• Sub atomic particle

Tags

NGSS.MS-PS1-1

What subatomic particles would you find in the nucleus of an atom?

• Protons only
• Protons and Neutrons
• Neutrons and Electrons
• Protons and Electrons 

Tags

NGSS.MS-PS1-1

The electron is not included in the calculations for the atomic mass because

• It has negative charge

• It is located in the outer energy levels of the atom

• Its mass is basically zero

• It attracts neutral particles

An atom has 9 protons, 10 neutrons, and 9 electrons.

What is the charge on this atom?

• -1

• 0

• +1

• 19

• 18

An atom has 8 protons, 8 neutrons, and 10 electrons.

What is the mass of this atom?

• 8

• 16

• 18

• -2

Sodium has an atomic number of 11, how many protons does this atom have?

• 22
• 11
• 12
• 2

Answer explanation

The smaller number is the atomic number and it is the number of protons in the nucleus.

Tags

NGSS.MS-PS1-1