WORLD OF CHEMISTRY

VOCAB WORDS

100

Anything that occupies space and has mass.

MATTER

200

A combination of two or more pure substances is called?

MIXTURE

300

It pertains to the ability of an object to transfer heat and electricity

CONDUCTIVITY

400

It states that the amount of matter can neither be created nor destroyed

LAW OF CONSERVATION OF MASS

500

He proposed the LAw of Conservation of Mass

ANTOINE LAVOISIER

CHEMICAL REACTION

100

In a chemical equation, chemical reaction is represented by what symbol?

An Arrow ---->

200

In a chemical reaction, if there are 12 sets of H₂0, how many Hydrogen will there be?

24

300

The two substances that undergo chemical reaction is called ________

REACTANTS

400

If hydrogen atom weighs 110g eacted with 25g of oxygen. How much more oxygen is need if it produced only 100grams of water?

35g

500

If sodium atom weighs 250g and it reacted with 125g of chlorine. How much more chlorine is needed to have 400g of NaCl

25g

PHYSICAL vs CHEMICAL

100

When an ice cube turns into liquid water it undergoes what kind of phase change?

MELTING

200

When dry ice (solid carbon dioxide) turns into carbon dioxide gas it undergoes what kind of phase change?

SUBLIMATION

300

It occurs when substances combine or break apart to form new substances with different chemical properties.

CHEMICAL CHANGE

400

A physical property described as the ability of a matter to be flattened

MALLEABILITY

500

What are the three major examples of Chemical Properties

Flammability, Reactivity and Combistibility

WORLD OF ATOMS

100

It is the building block of matter

ATOM

200

The subatomic particle that carries a positive charge is called _______

PROTONS

300

If Boron has 5 protons, 6 neutrons and 3 electrons. What will be its mass?

11

400

If Nitrogen has 7 protons, how many electrons does it need for it to become neutral?

7

500

If Beryllium has 4 protons, 4 neutrons and 2 electrons. What type of ion does it have?

POSITIVE ION

CHEMICAL EQUATIONS

100

What are the two main parts of a chemical equation?

REACTANTS AND PRODUCT

200

 3N₂ + 2H₂ = 2NH₃ is an example of a balanced equation. TRUE OR FALSE

FALSE

300

In a chemical equation 4H₂ + 2O₂ = 4H₂O how many hydrogen do you have in your product?

8

400

What coefficients should there be for this chemical equation to be balanced: __H₂ + __O₂ = ___H₂O 

2,1,2

500

What coefficients should there be for this chemical equation to be balanced: __CH₄ + __O₂ = ___CO₂ + ___H₂O

1,2,1,2