Atoms & Elements

What tells you the number of protons in the nucleus of an element?

• atomic number

• nucleic number

• chemical symbol

• mass number

Where are electrons found?

• with a proton partner

• by the neutrons

• nucleus

• electron cloud

Check all statements that are correct about a chemical symbol.

• An abbreviation that represents an element.

• Most elements have a 1 or 2 letter chemical symbol.

• The first letter is always capitalized and the other letters are lowercase.

• They are different in each language

• A chemical symbol often contains letters from the elements name. (but not always!)

What do protons and electrons have that neutrons do not?

• weight

• mass

• a charge

• volume

What is determined when neither red or blue litmus paper changes color?

• presence of an acid

• presence of a neutral substance

• presence of a base

• The litmus paper is old

Metals all share certain physical properties. Which property do most metals share? Check all that apply.

• shiny

• dull

• good conductors of heat & electricity

• malleable

• in the middle of the periodic table between nonmetals & metalloids

Non- Metals all share certain physical properties. Which property do most nonmetals share? Check all that apply.

• dull

• malleable

• left side of the zigzag line

• right side of the zigzag line

• brittle

What is the center of an atom called?

• nucleus

• core

• center

• middle

Why are atoms considered electrically neutral?

• The positive charge of the electrons balance out the negative charge of the protons.

• The positive charge of the protons balance out the negative charge of the electrons.

• The neutral neutrons make up most of the atom.

• The orbit of the electrons causes the neutrons to release a neutral charge

What are the 3 main classes of elements?

• compounds, mixtures, & molecules

• igneous, metamorphic, & sedimentary

• actinides, lanthanides, & noble gases

• metals, nonmetals, & metalloids