Practice for Ions groups, atoms, and bonding

The process in which light nuclei combine at extremely high temperatures, forming heavier nuclei and releasing energy.

• Fission
• Chain Reaction
• Half-life
• Fusion

According to the graph above, what is the half-life?

• 2 years
• 4 years
• 6 years
• 8 years

Sodium-24 has a half-life of 15 hours. How much Sodium-24 will remain in an 18.0g sample after 30 hours?

• 18.0 g
• 9.0 g
• 2.25 g
• 4.5 g

Which of the following is true about an atom with the charge of +1?

• It has lost 1 proton
• It has lost 1 electron
• It has gained 1 proton
• It has gained 1 electron

Carbon has an atomic number of 6. Carbon-14 is a naturally occurring isotope of carbon. How many neutrons are in carbon-14?

• 6
• 2
• 8
• 28

What particles represent the protons, and what is the identify the element?

• 1, berylium
• 2, Hydriogen
• 3, Carbon
• 4, berylium

What is the mass number of the atom with 26 protons, 26 electrons, and 30 neutrons?

• 26
• 52
• 56
• 92

An atom of silicon has 14 protons, 16 neutrons, and 14 electrons, what is correct name for this atom?

• Silion-14
• Silion-16
• Silion-28.09
• Silion-30

Elements that are semiconductors and are brittle solids, and are poor conductors at room temperature are ____.

• metals
• nonmetals
• metalloids
• Isotopes

Why is Hydrogen grouped with the alkali metals even though it is a gas?

• It has 1 proton
• It has 1 valence electron
• It is a metal
• It is a metalloid