Atomic Structure

What particle provided the positive charge for an atom?

• proton 
• neutron
• electron
• nucleus

Which particle does not contribute mass to the atom?

• Proton
• Neutron
• Electron
• Nucleus

How many protons are in an atom with an atomic number of 20, an atomic mass of 45, and a charge of +2?

• 20
• 10
• 2
• 18

Tags

NGSS.HS-PS1-7

What is the atomic mass (rounded to the nearest whole number) of this element

• 196
• 196.95
• 197
• 79

What scientist is best known for his gold foil experiment?

• J.J. Tomson
• Ernest Rutherford
• John Dalton
• Democritus

How many neutrons will an atom have it has an atomic number of 26, an atomic mass of 58 and a charge of +3?

• 26
• 58
• 32
• 3

How many protons, electrons, and neutrons does Chlorine -36 have?

• 17, 17, 19
• 17, 19, 19
• 17, 17, 36
• 17, 19, 36

An aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. Its mass number is

• 13
• 14
• 27
• 40

The central region of an atom where neutrons and protons are is the _________. 

• nucleus 
• electron cloud
• core 
• center 

The name of the subatomic particle that determines the identity of an atom.

• proton
• nucleus
• electron
• neutron