Isotopes, Isobars and Isotones

How many neutrons does the isotope of Lithium have?

• 8

• 3

• 4

• 5

Tags

NGSS.MS-PS1-1

In a correctly written symbol what would be located in the "A" position?

• number of neutrons
• atomic number
• number of electrons 
• mass number

Tags

NGSS.HS-PS1-8

The _________ of an element equals the number of protons in an atom of that element.

• mass number
• neutrons
• atomic number
• isotopes

The __________ of an atom is the sum of the protons and neutrons in the nucleus of that atom.

• mass number
• atomic number 
• charge
• isotope weight

Tags

NGSS.MS-PS1-1

what is the mass number of an atom that contains 28 protons, 28 electrons and 34 neutrons?

• 28
• 56
• 62
• 90

An atom's mass number equals the number of...

• protons plus the number of electrons
• protons plus the number of neutrons
• protons
• neutrons

Tags

NGSS.MS-PS1-1

Which statement about the atomic nucleus is correct?

• The nucleus is made of protons and neutrons and has a negative charge.
• The nucleus is made of protons and neutrons and has a positive charge.
• The nucleus is made of electrons and has a positive charge.
• The nucleus is made of electrons and has a negative charge.

an neutron has a ____________ charge

• positive

• negative

• neutral

Isotones are elements have the same amount of

• Proton

• Neutron

• Electron

Isobars are elements that have the same

• Atomic no.

• Atomic Mass No.

• Neutron No.