Atomic Radius

Within periods on the periodic table: Size decreases as you go down a group

• Flase

• True

As you move ______ a group, more energy levels are added, which increases the size of the atom

• down

• up

• diagonal

• away

Which element's atom is larger? Nitrogen or Phosphorus?

• Nitrogen

• Phosphorus

Which element's atom is the smallest?

• Rhodium

• Silver

• Cadmium

• Tin

Size (a)   as you go across a period on the periodic table.

Which of these best explains the reasoning behind the trend that as you go across a period, size decreases?

• As you go across a period, more energy levels are added, which shrinks the atom.

• The added electrons in the nucleus give the atom a negative charge, which shrinks the atom.

• The added protons in the nucleus pull the electrons closer to them, which shrinks the atom.

• All of the above

Tags

NGSS.HS-PS1-2

Which order is correct from largest to smallest atomic radius?

• Thallium, Indium, Gallium, Boron

• Boron, Thallium, Indium, Gallium

• Boron, Gallium, Indium, Thallium

• Thallium, Gallium, Indium, Boron

Tags

NGSS.MS-PS1-1

Which atom has the largest atomic radius?

• potassium

• rubidium

• francium

• cesium

As you move down the periodic table atoms get bigger.  This is because ____________.

• The atoms have more mass.
• The atoms have more protons.
• The atoms have more energy levels
• The atoms have more nuetrons

As you move across the periodic table atoms tend to get smaller because, ______________.

• the atoms have more mass.
• the atoms have less mass
• the atoms have more protons.
• the atoms have less electrons.