Dr. C OH Semester Review 2023

The arrow in a chemical reaction is read as "yields"?

When hydrogen peroxide is poured on skin, it breaks down into water and oxygen gas. This is an example of

A Lewis Diagram is a way to indicate the number of valence electrons around an atom.

Electrons in the outermost energy level of an atom are called

A mixture can be separated by physical means.

A periodic table trend that describes how easily an atoms accept electrons

In the chemical equation shown below, the red number three is called the

Observations involving numbers or amounts are called

What type of chemical reaction is shown below?

Which of the following is an example of a container that is filled with a pure substance rather than a mixture?

The physical property of a material to be hammered thin or stretched into a wire without breaking

Which is not a periodic trend?

The diagram below shows a Bhor dot structure.

What do metals tend to with electrons to achieve stability?

When a non-metal and a non-metal bond, what type of bond is formed?

What type of reaction is shown below?

Tearing out a picture from a magazine is an example of what type of change?

In this example, the number 26.98 identifies the element's

Periodic trends are patterns in the properties of elements.

Which diagram below represents ELEMENTS?

What does diagram 2 represent?

Group 1 metals tend to lose one electron to become an ion with a

A(n) ___ is a reasonable explanation or assumption about an event or phenomena based on facts and/or prior knowledge.

When balancing equations, what should never be changed?

Group 18 elements on the periodic table (colorless, odorless gases, are non-reactive) sometimes called inert gases.

The _____ of a substance is the sum of the average masses of the atoms in one molecule of a substance.

Baking chocolate cupcakes is an example of what type of change?

The columns on the periodic table that show elements with the same number of valence electrons are called

The product appears on the left side of a chemical equation.

Which element reacts like Bromine (Br) but has a lower atomic mass?

Dirt, pebbles and sand combining to form soil is an example of the formation of a compound.

This identifies the number of protons in the nucleus of an atom and its place in the periodic table.

A property that measures the tendency of an atom to attract electrons to form a bond is called

The atomic mass is the distance between an atom's nucleus and its outermost (or valence) electrons.

Which of the following is formed when two elements combine chemically?

Group of elements characterized as dull, brittle, and poor conductors of heat and electricity

In chemistry, elements are pure chemical substances containing only one type of atom.

When a metal bonds with a non-metal, what type of bond is formed?

A(n) _____ happens when one or more chemicals are changed into one or more other chemicals.

How can you tell if two elements are from the same period on the periodic table of elements?