Science Midterm UMS review

Front

What is a chemical property of a substance?

Back

A chemical property is a characteristic that can only be observed during a chemical reaction, such as reactivity with other substances.

Front

What happens when two forces act on an object in opposite directions?

Back

The object will move in the direction of the net force, which is the difference between the two forces.

Front

What is Newton's Third Law of Motion?

Back

For every action, there is an equal and opposite reaction.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus of an atom.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

How do you calculate the number of neutrons in an atom?

Back

Subtract the atomic number from the mass number: Neutrons = Mass Number - Atomic Number.

Front

What is reactivity in terms of chemical properties?

Back

Reactivity refers to how readily a substance undergoes a chemical reaction with other substances.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object, typically measured in meters per second squared (m/s²).

Front

What is the principle of conservation of momentum?

Back

The total momentum of a closed system remains constant if no external forces act on it.