Science Exam

Grade 10 Science Exam Review: chemistry, biology, physics

Is aluminum a metal or non-metal

metal

What is a Synthesis Reaction?

A Synthesis reaction is a chemical reaction that includes two or more elements that form a compound

what type of reaction is “A+B—>B+AC”

Single Displacement Reaction

If chlorine is alone in a reaction how is it represented?

cl2

What reaction is the same as a “Neutralization Reaction”?

Double Displacement Reactions

How many neutrons does Boron have?

Boron has 6 neutrons

How does the pH scale work?

the lower the number the higher the acidity. the higher the number the higher the base. 7 is neutral.

How do acids react to litmus paper? How does it work?

The paper will turn red. because they donate hydrogen ions to the litmus dye molecules

What do bases release when dissolved in water?

Bases release “hydrogen ions (H+)” when they are dissolved in water

How many electrons does helium have?

Helium has 2 electrons

What is the law of conservation?

The law of conservation is “The mass of the products always equals the mass of the reactants”

What is the charge of alkaline earth metals?

The charge of alkaline earth metals is +2

Is zinc a multivalent metal?

Zinc is not a multivalent metal

What happens to reactants in a chemical reaction?

Reactants are transformed into entirely new substances called products. Reactants are completely used up/consumed.

What side are non-metals on? What do non-metals form?

Non-metals are on the right side, and they form negative/anions ions.

Why is SO2 a molecular compound?

It is a molecular compound because it is between two non-metals.

When does nitric acid form?

Nitric acid forms when hydrogen nitrate forms an aqueous solution

Is slippery a property of acids?

slippery is not a property of acids

What does neutralization reactions always include?

Salt & Water

What are substances on the left side of chemical reactions are called

Reactants

What group is Argon in?

Noble Gases

What happens in telephase?

-Spindle fibers disappears

-Chromosomes begin to untangle as chromatin

-Nuclear membrane reappear around DNA

-Cell membrane pinches inwards

-Cytoplasm splits in half

-Daughter cells return to interphase

What happens in cytokinesis?