Atomic Structure

Charge of proton is

• positive
• neutral
• negative
• none

charge of neutron is

• positive
• neutral
• negative
• none

The charge of electron is

• positive
• neutral
• negative
• none

Atomic number is

• number of protons and neutrons added together
• number of electrons in the nucleus
• number of protons in the nucleus
• number of neutrons

Mass number is

• number of protons and neutrons added together
• number of electrons in the nucleus
• number of protons in the nucleus
• number of neutrons

number of proton in an atom is the same

• as the number of neutrons
• as the number of valence electrons

• as the group number in the periodic table
• as the number of electrons

The three important elements in Group 1 is...

• lithium, sodium, potassium
• sodium, magnesium, calcium
• lithium, sodium, aluminum
• potassium, sodium, magnesium

The four important elements in group 7 is

• lithium, sodium, potassium
• nitogen, oxygen, phosphorus, sulfur
• fluorine, chlorine, bromine, iodine
• fluride, bromide, chloride, iodide

The maximum number of electrons in the first shell is

• 2
• 8
• 7
• 1

the maximum number of electrons in the second shell is

• 1
• 2
• 7
• 8