ATOMS
MOLECULES
ELEMENTS
PERIODIC TABLE
Chemical Reactions
100
An atom is the simplest particle of _____________ that can exist.
What is matter?
100
A molecule is two or more _______________ bonded together.
What are atoms?
100
The ________________________ organizes all known elements.
What is the Periodic Table?
100

The number of what subatomic particle determine which element a substance is?  Options: protons, neutrons, and electrons.

What are protons?

100

What is the law of conservation of matter?

Matter cannot be created or destroyed, only transformed from one form to another.

200
Particle of an atom with a negative charge.
What is an electron?
200
Atoms bond together to create molecules by either gaining or losing these.
What are electrons?
200

The group number on the periodic table tells you the number of what for an element?

What is valence electrons?

200
Elements are listed by the number of protons in the atom’s nuclei. What is this number called?
What is the atomic number?
200

A chemical reaction in which one product is formed from two reactants is called what?


What is a synthesis reaction?

300
Particle of an atom with a positive charge, located in the ____________.
What is a proton/nucleus?
300

Each shell can hold only a certain number of _____________ which determines what kind of atoms each atom can __________________ with.

What are electrons/bonds?

300
The configuration of protons, neutrons and electrons in an element’s atom is what makes one element _______________________ from another element.
What is different or unique?
300

What does the number of protons plus the number of neutrons equal?

What is the atomic mass?

300

What kind of chemical reaction is this?


A + BC --> B + AC

What is a single displacement reaction?

400
What do electrons orbit around the nucleus in?
What is electron shell or electron cloud?
400

A bond formed by transferring electrons is called what?

What is an ionic bond?

400
If the element gold has 79 protons and 118 neutrons, how many electrons does it have?
What is 79 electrons?
400

What determines the reactivity of an element?

What is number of valence electrons?  The closer to 8, the more reactive.
400

A chemical reaction in which two or more products for from one reactant is what?

Ex: AB --> A + B

What is a decomposition reaction?

500

The number of protons in a neutral atom is equal to the number of _________________ in an atom.

What are electrons?

500

A bond formed by the sharing of electrons is called what?

What is a covalent bond?

500
If you know the atomic number and the atomic mass of an element, how do you calculate the number of neutrons in an element’s atom?
What is atomic mass – atomic number = # of neutrons
500

What is the currency of a chemical reaction (i.e. what do atoms use)?

What is valence electrons?

500

Why do molecules undergo chemical reactions?

What is to become more stable/lower energy?

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