Substance made of the same kind of atom.

Simplest unit of matter

Matter made of two or more different kinds of compounds and/or elements

Which letter shows a single compound?

Which letter shows a mixture of atoms and molecules?

Which picture shows atoms only?

Which diagram shows a single element?

Cations :

Has a negative charge:

Has a tiny amount of mass

Is neutral

Found outside the nucleus

Has a positive charge

Most of an atom is made of

Who was the first person to suggest all matter was made of tiny indivisible particles?

Most of an atom's mass is:

Which of the following is a characteristic of the nucleus?

What charge does the nucleus have?

An atom's nucleus is made of:

All atoms of the same element must have the same number of :

The Atomic Number represents:

The Mass Number of an atom comes from:

Nitrogen has ______protons, ______electrons and _______neutrons.

An element of Sc has _____protons, _____electrons, and ____neutrons

Atomic Mass is a decimal because:

Electrons in a neutral atom are equal to the number of:

Neutrons are equal to:

If you have an element with an atomic number of 24 the element is:

Element 6 is

Element 6 has _______________protons:

Element 6 has ________________electrons:

Element 6 belongs to group?

Element 6 has ____________________valence electrons:

Electrons moving from one energy level to another emit photons.

When an electron absorbs energy then it can move to a new energy level (shell)

When electrons are excited within an atom they can change energy levels. When they begin to lose this energy they will return to their previous energy level and emit a photon. We can look at this light with something called a spectrascope. What do we see when we look through the diffraction grating?

Electrons in the outermost shell:

Are on the right side of the stair step line

Amount of energy needed to remove an electron

On the left of the stair step line

Ability of an atom to attract electrons

Thermochemistry is the study of

When heat leaves from the system to the surroundings the reaction is :

When heat enters the system from the surroundings the process is

Who arranged the periodic table by atomic number?

 $q=mc\Delta T$  the q in this equation stands for : 

 $q=mc\Delta T$  The c in this equation stands for :

 $q=mc\Delta T$  The m in this equation stands for 

I hope you enjoy your break! I look forward to seeing you next semester. Stay safe!