Chemistry Extra Credit - 1 period

What is the charge for protons?

Positive (+)

What is the charge for electrons?

Negative (-)

What would it be if there were more protons than electrons?

Positive (+1)

What is in the nucleus?

Protons and electrons

Why does an atom become an ion?

Because it is more stable by losing electrons to have a full outermost energy level

How does an atom become an ion?

It gains or loses electrons

If an atom loses electrons it becomes what?

A positive/cation ion

If an atom gains electrons it becomes what?

A negative/anion ion

What are some examples of physical change?

Cutting, bending, phase changes like boiling, melting, and freezing

What are examples of chemical change?

Rusting, burning, tarnishing, fruit ripening, decomposing

What are the 2 types of mixtures? What are examples of each?

Homogenous- salt water, gatorade Heterogenous- oil and water, sand, trail mix

What are pure substances? What are some examples of each?

Element-carbon, compound-water H2O

What is matter?

Anything that has mass and takes up space (has volume)

What is isotopes?

Atoms of the same element, but have different mass OR Atoms with the same number of protons, but have different numbers of neutrons

What is a ionic charge?

Difference between number of protons and number of electrons

What is atomic number?

Number of protons in and atom, gives the identity of the element

What is mass number?

Number of protons plus number of neutrons

Are the protons located inside or outside of the nucleus?

Inside

Are the neutrons located inside or outside of the nucleus?

Inside

Are the electrons located inside or outside of the nucleus?

Outside