What is the smallest particle of an element that still has the properties of that element?

• atom

Which of these is NOT a property of metals?

• Shiny
• Good conductor
• Brittle
• Can be shaped

The periodic table is arranged in rows called periods.

Which element is found in the first group (Group 1) of the periodic table?

• Helium
• Hydrogen
• Oxygen
• Carbon

True or False: Elements in the same group have similar properties.

What is the name for the columns on the periodic table?

• groups

Which of these elements is a gas at room temperature?

• Iron
• Oxygen
• Gold
• Copper

The atomic number tells us how many protons are in an atom.

What happens to the atomic size (radius) as you go down a group in the periodic table?

• It gets smaller
• It stays the same
• It gets bigger
• It disappears

Which group in the periodic table contains the noble gases?

• Group 1
• Group 2
• Group 17
• Group 18

Elements in the same period have the same number of electron shells.

As you move from left to right across a period, what generally happens to the atomic radius of elements?

• It increases
• It stays the same
• It decreases
• It disappears

Hydrogen is a metal.