Atoms and Electrons Read & Answer

Hydrogen bromide is a chemical compound. It’s formed from atoms of hydrogen and bromide, two

• electrons

• elements

• neutrons

• nuclei

Silver is an element that can conduct electricity and heat and is shiny. Silver is most likely

• a metal

• a non-metal

• a liquid

• not malleable (can be molded)

On the periodic table, gold has the atomic number 79. This means that

• 
  an atom of gold has 79 protons and electrons combined.

• 
  gold can be found in 79 isotopes.

• 
  gold was the 79th element discovered.

• an atom of gold has 79 protons.

A noble gas is least likely to

• exist as a gas at room temperature.

• 
  glow.

• be used in a neon light.

• react with a metal.

In the chemical reaction of baking cookies, the product is

• 
  the ingredients that are mixed together before baking.

• the temperature at which the oven is set.

• 
  the cookies that are baked at the end.

• 
  frosting that can be added after the cookies cool.