How do atoms differ

Are you enjoying the video lesson?

• Yes

• No

what does the atomic number of an element refer to

• the number of Neutrons

• the mass number

• the number of protons

• the atomic Mass

whihc term identifies each isotope of an element and is the sum of the number of protons and neutrons in the nucleus

• atomi Number

• Atomic MAss

• Mass number

• Atomic Mass unit

Which Term identifies each isotope of an element and is the sum of the number of protons and
Neutrons in the nucleus

• atomic number

• atomic mass

• mass number

• atomic Mass unit

in a Neutral atom, what is the number of electrons equal to

• Mass number

• Atomic Mass

• Atomic number

• neutron number

Which of the following is true

• an atoms Mass depends mainly on the number of electrons it contains

• the atomic mass of an element is the weighted average of the atomic numbers of isotope

• a mass of 1 amu is nearly equal to the mass of a single electron

• one atomic mass unit is one-twelfth the mass of carbon- 12 atom