Unit 2 Atoms Electrons Periodic Table

The atomic particle that determines the chemical properties of an atom is the

How many electrons are present in a neutral phosphorus atom with a mass number of 30?

The statement that an electron occupies the lowest available energy orbital is

Elements in which the d-sublevel is being filled have the properties of

A quantum of electromagnetic energy is called a(n)

The atomic number tells you what about an element?

The maximum number of electrons a d orbital can hold is

The average atomic mass of an element is calculated using a weighted average mass of its

If an electromagnetic energy has a low frequency, then it has a ______ wavelength.

One half the distance between nuclei of identical atoms that are bonded together is called the

Electromagnetic energies all have the same

The principal quantum number indicates

The number of possible different orbital shapes for the second energy level is

Nitrogen, atomic number 7, belongs to group 15 (V). How many electrons does nitrogen have in its outermost energy level?

The symbol for Iron is

The size and shape of an electron cloud are most closely related to the electron's

What is the electron Configuration for carbon, atomic number 6?

A negative ion is known as a(n)

An atom with 16 protons and 17 neutrons is an atom of

Name 2 elements that have similar properties based on their groupings in the periodic table.

The s orbital is shaped like a

Mendeleev predicted that the spaces in his periodic table represented

Thomason's experiments with cathode ray tubes led to the discovery of the

Which of the following is a halogen?

Isotopes of an atom have different

Energy is absorbed by an electron when it

Scientist whose alpha-particle experiment led him to conclude an atom is mostly empty space with a dense (+) nucleus is

In oxides of carbon, such as CO₂ and CO, atoms combine in small whole number ratios. This evidence supports the law of

Calcium is a

A horizontal row in the periodic table is called a(n)