Basic chemistry quiz

What is the mass of an atom for a chemical element

What is the tells you the number of protons in the nucleus for an atom.

True or false, a covalent bond is a chemical bond that shares electrons to from electron pairs?

True or false, a ionic bond is a type of chemical bonding that does not involve a electrostatic attraction between oppositely charged ions?

Match the following

What is a endothermic reaction?

True or false, a exothermic reaction is when heat his being released

for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time is known as?

True or false, a chemical substance that cannot be broken down into other substances is known a element?

True or false, oxygen is a element on the periodic table?

True or false, an example of exothermic reaction is a ice cube in the sunlight?

True or false, an example of a endothermic reaction is a fire giving off heat?

True or false, Helium is a element that is apart of the periodic table?

Match the following

True or false, iron is a element on the periodic table?