When a new substance is formed, a _______ has occurred.

A _____ is made up of one type of atom; when two or more or these combine they form a _________.

A _____ consist of two or more types of particles and can be separated by physical means.

Which of the following is correctly paired?

Which of the following can be separated by physical means?

A _________ mixture has substances that are mixed uniformly throughout and the different components are not visible; a __________ mixture has components that are distinctly visible.

Sugar can dissolve in water. What physical property is described?

Gasoline vapour is highly flammable and can burn easily. What chemical property is described?

What did Dmitri Mendeleev do?

The three subatomic particles are:

Electrons are negatively charged particles that exist in specific ________ around the nucleus.

The _____ is the smallest particle of an element.

This diagram shows the electron arrangements of atoms and ions.

Both protons and neutrons are found in the dense, positively charged center of the atom called the ______.

The outermost energy shell of an atom is called the ______ shell.

The electrons occupying the valence shell are called _______.

They are the only elements on the periodic table that have full valence shells.

When is an element considered "stable"?

______ consist of a positively charged ion and a negatively charged ion, held together by strong ionic bonds.

A binary ionic compound is made up of two elements: ___ and ___

_____ consist of two or more non-metals held together by strong covalent bonds?

Which is true of the following element compounds?

a. Ionic compounds are the giving of electrons.

b. Covalent compounds are the sharing of electrons.

_____ bonds are created when the elements share their valence electrons.

The _____ of an ionic compound uses subscripts to show the number of metal ions an non-metal ions there are in a compound.

What was Democritus definition of an atom?

The word atom is derived from what Greek word which means indestructible?

Proposed the theory and supported Democritus that atoms are indestructible and all around us

Created the periodic table by arranging the atomic mass of the elements

Plum Pudding Model

Charged Electric Cloud Model

Which model was created by Neils Bohr?

What did Ernest Rutherford discover about the atom?

He discovered the existence of electrons.

What is the characteristic of noble gases?

CO₂

NaCl also known as table salt

solid → liquid

liquid → solid

gas → liquid

gas → solid

solid → gas

liquid → gas

combustibility, reactivity and lack of reactivity are examples of _____ properties of matter.

melting, change in state, texture and the ability to conduct heat and electricity are examples of ______ properties of matter

solubility, melting point, boiling point, freezing point are examples of _____ physical properties of matter

color, texture, appearance, size and shape, malleability, viscosity and ability to conduct heat and electricity are examples of _______ properties of matter

A ____ is a common example of a chemical reaction.

Energy is released in the form of ____.

In a chemical reaction, one or more substances (reactants) interact to form a different substance or substances (________).

_________ is the average mass of an atom of an element.

The atomic ____ is the number of protons in an atom.

When a neutral atom gains or loses an electron, it becomes charged. A charged atom is called an _______.

The molecules in a solid are ______.

The molecules in a liquid are ______.

The molecules in gas are ________.

Rotting fruit (or fruit turning brown when exposed to oxygen) is an example of ________.