Ps midterm bk

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

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

An element with a mass number of 11 and an atomic number of 5 has how many neutrons?

• 11
• 5
• 6
• 16

The mass of one proton is greater than the mass of one...

• neutron
• electron

What is the atomic mass of the atom pictured? 

• 9
• 10
• 18
• 19

What is the atomic number of the atom pictured? 

• 9
• 10
• 18
• 19

All elements are composed of 

• molecules
• atoms
• neutrons
• compounds

____________ can move from one energy level to another when they gain or lose energy.

• electrons
• protons
• neutrons
• atoms

Atoms of the same element must always have the same number of _________

• electrons
• neutrons
• isotopes
• protons

region of space where an electron is likely to be found.

• atomic number
• nucleus
• orbital
• electron zone

What is the electrical charge of a proton?

• 1+
• 1-
• neutral
• 2-