Semester 1 Exam Review

Front

Atomic radius generally increases as we move __________.

Back

down a group and from right to left across a period.

Front

Who discovered that the atom had a small, dense, positively charged center?

Back

Ernest Rutherford.

Front

You should never ______ chemicals in the lab without your teacher's permission.

Back

all of the above.

Front

Ionization energy is...

Back

how much energy it takes to remove an electron from an atom.

Front

How many significant figures are in the number 4004?

Back

4.

Front

What is the definition of atomic radius?

Back

The distance from the nucleus of an atom to the outermost shell of electrons.

Front

What is the significance of Ernest Rutherford's gold foil experiment?

Back

It led to the discovery of the atomic nucleus.

Front

What is the definition of ionization energy?

Back

The energy required to remove an electron from an atom.

Front

What is the trend of ionization energy across a period?

Back

Ionization energy generally increases from left to right across a period.

Front

What is the trend of atomic radius down a group?

Back

Atomic radius generally increases down a group.