Atoms P5

What does the 1.00794 stand for?

• Hydrogen

• atomic number

• atomic mass

• atomic explosion

Tags

NGSS.HS-PS1-1

The central region of an atom where its neutrons and protons are is its

• nucleus

• electron cloud

• core

• center

Beryllium has how many protons?

• 4
• 9.0122
• 2
• 13.0122

Tags

NGSS.MS-PS1-1

The smallest unit of an element is __________

• matter

• a cell

• a proton

• an atom

Tags

NGSS.MS-PS1-1

Arjun, Elijah, and Liam are having a debate. Arjun says the part of the atom with a positive charge is the proton, Elijah thinks it's the neutron, and Liam believes it's the electron. Who is correct?

• Elijah (Neutron)

• Arjun (Proton)

• Liam (Electron)

Which of the following best describes a proton?

• A subatomic particle that is very, very small and has a negative charge.

• A positively charged subatomic particle that is found in a cloud around the nucleus of an atom.

• A neutral particle found in the nucleus of an atom.

• A positively charge subatomic particle found in the nucleus of an atom.

In the following diagram, what does the number 12 represent.

• An atomic number

• A number of electrons

• An atomic mass

• The element

Tags

NGSS.MS-PS1-1

Lithium has 3 protons and an atomic mass of 7. How many neutrons does lithium have?

• 3

• 4

• 7

• can tell with the information given

Tags

NGSS.MS-PS1-1

Which part of an atom has no charge?

• protons
• neutrons
• electrons
• atoms

Which letter represents an electron?

• A
• B
• C
• D

Tags

NGSS.MS-PS1-1