Possible correct answers:
A basic building block of matter
something found on the periodic table
A substance that cannot be broken down into simpler substances
100
What is the simplest form of matter?
Element
100
Name the element with the chemical symbol Fe
Iron
100
How can you tell if two elements are similar?
They must be in the same group!
(Vertical)
100
One atom of oxygen and two atoms of hydrogen chemically combine to form a/an
A. mixture
B. solution
C. element
D. compound
D. Compound
200
What elements are found in H20?
Hydrogen and Oxygen
200
To make a chemical reaction you need ___________ and _________.
reactant and product
200
Matter is found in what phases?
Solid, Liquid and Gas
200
If two elements are not in the same group, are they similar?
NO!
200
Number of Equation Chemical Reactions
1 Al + O2 --> Al2O3
2 C2H6 + O2 --> CO2 + H2O
3 Mg + Cl2 --> MgCl2
4 CO2 + 4H2 --> CH4 + H2O
Which equation represents that the total mass stays the same during a chemical reaction?
A. 1
B. 2
C. 3
D. 4
C. Mg + Cl2 --> MgCl2
300
What are group 18 elements called?
The Noble Gases
300
Which hypothesis would be the most valuable?
A) A hypothesis that leads to collection of numerical data
B) Hypothesis that everyone agrees on
C) Hypothesis that states a possible outcome and why
D) Hypothesis that is proved to be true after the experiment
C. Hypothesis that states a possible outcome and why
300
What is the conservation of mass?
Reactants = products
300
Copper has an atomic number of 29 and its atomic mass is 64. How many electrons, neutrons and protons does Copper have?
Electrons- 29
Protons- 29
Neutrons- 35
300
Rusting is a result of the iron in the nail reacting with ?
Oxygen
400
What elements are found in NaHCO3?
Sodium, Hydrogen, Carbon, Oxygen
400
What is the difference between CO and Co?
Hint: Think about one thing vs a combination of things
One is a substance and one is an element.
Carbon and Oxygen vs. Cobalt.
400
Name two types of evidence that tell you a chemical reaction occurred:
Possible answers- bubbles, gas, color change, smell, noise
400
Which of the following pairs have different properties?
A. sodium and sulfur
B. oxygen and sulfur
C. potassium and sodium
D. magnesium and calcium
MUST EXPLAIN WHY!
A. Sodium and Sulfur
They are not in the same column.
400
If a base is added to an acid, what type of ions is added to the solution?
OH-
500
How many carbon and oxygens are in Carbon Dioxide- CO2?
Carbon -- 1
Oxygen -- 2
500
List the 3 basic subatomic particles and their charges
Which of the following is true of elements when chemically reacting with another element?
A. The elements undergo no change.
B. The product has different properties than the original elements.
C. The product maintains the same properties as the original elements.
D. The physical properties of the original elements combine in the final product.
B. The product has different properties than the original elements.
500
Part 1) Describe how you can find the number of valence electrons
Part 2) Draw 2 electron dot diagrams