True or false?

In order for an ionic bond to form, there needs to be a cation and an anion.

Name the particle discovered by James Chadwick in 1932.

Of Be, Be1+, Be2+, and Be3+, which would have a line spectrum most similar to that of hydrogenatom? Explain your reasoning.

Perfume evaporating, because the top is left off the bottle, is an example of a chemical change. True False

The polyatomic ion with the formula CN - is called

Can a particle be a molecule? Explain ...

Which is a pure substance A) mixture B) solution C) element

Samuel adds a teaspoon of salt to a glass of water. He notices that the song disappears. Samuel takes a sip to discover that the water taste salty. What kind of change has occurred?

How are the physical and chemical properties of atoms represented on the periodic table of elements

how do we know isotopes exist?

Is albinism a dominant or recessive trait