Atomic Structure #1
Atomic Structure #2
Balancing Chemical Equations
Balancing Chemical Equations
Compounds
100
Neutrons have positive charge. Is true or false ?
false, neutral (no charge)
100

What did Mendeleev do?

He organized the periodic table of elements by atomic weight. 

100
What is balance chemical equation?
A balanced equation has equal numbers of each type of atom on each side of the equation.
100

balance the equation 2P+ 3Cl(2)→ PCl(3)

2P+ 3Cl2→ 2PCl(3)

100
(h2) is compound or element
compound
200

Where are the electrons in an atom located?

Atomic orbitals or the valence shells

200
All atoms of zinc have # protons?
30 protons
200
What is the Law of Conservation of Mass?
The Law of Conservation of Mass is a relation stating that in a chemical reaction, the mass of the products equals the mass of the reactants.
200

Balance this equation: Fe + H2S04  ----- Fe2(SO4)3 + H2

2 Fe + 3 H2S04 ---- Fe2(SO4)3 + 3 H2

200
(CO2) is a element or compound?
element
300
Which subatomic particle has the smallest mass? 1proton 2neutron 3electron
electrons
300
The atomic number tells the?
number of protons in atom
300
All chemical reactions happen at the same speed. True or false
False
300
Reaction rates can be changed. True or false
True
300
What is different from a compound and element?
Element has one type of atom and compound has two or more atoms.
400
What is atomic number of carbon ?
6
400

What are isotopes?

One of two or more atoms that have the same atomic number but a different number of neutrons.

400
Reaction rates can be defined as 1.Changes in reactant or product concentration over time. 2.Changes in equilibrium constant over time.
Changes in reactant or product concentration over time.
400
Reaction rates can change over time as the reaction proceeds. True or False
True
400

Explain a heterogenous mixture

A mixture that is not uniformly distributed. They are not chemically bonded together. They can be separated. 

500
A beryllium atom has 4 protons, 5 neutrons, and 4 electrons. What is the mass number of this atom?
9
500

What is ion?

Ion is an atom or molecule in which the total number of electrons is not equal to the total number of protons, giving the atom or molecule a net positive or negative electrical charge.

500
All elements can bond with all other elements. True or false
False
500

When mixing baking soda and vinegar, what are the products and how does it stay balanced? 

The products stay balanced because the reaction makes CO2 and H2O by taking oxygen from the room and or beaker. 

500

Describe the difference between a solvent and solute. 

A solvent is the dissolver and a solute is the material being dissolved. 

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