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Chemical Formulas
Periodic Table
Metals, Non-metals, and Metalloids
Vocabulary
Laboratory
100
The chemical symbol for Gold is...
Au
100
Group 1A elements are also called...
Alkali Metals
100
The element Lithium is in group 1A, therefore it is also known as an...
Alkali Metal
100
A substance made up of two or more elements that have been chemically combined together.
Compound.
100
What must you always have covering your eyes during an experiment?
Goggles.
200
How many atoms of Phosphorus are in the formula Na3PO4?
1.
200
The name of the element that is in group 8A and period 2 is_________.
Neon.
200
The only metal on the periodic table that is actually a liquid is the element_____________.
Mercury, Hg
200
What is a subscript? Give an example.
The small number that tells how many atoms of an element there are in a formula.
200
When you make a list of steps of what you will do in an experiment, it is called a...
Procedure
300
How many elements are included in the formula NaNO3?
3. Na, N, O
300
Do you expect Carbon to be more similar to Nitrogen, Oxygen, or Silicon. Why?
Silicon because they are in the same family.
300
An unknown substance conducts electricity and is brittle. Would the element be classified as a metal, non-metal, or metalloid?
A metalloid; it has properties of both metals and non-metals.
300
What does "amu" stand for?
"atomic mass units", which is the unit for the mass of an atom.
300
The instrument used to measure the volume of a liquid is called a__________.
Graduated cylinder.
400
Baking soda is a white powder used for baking or cleaning. When you mix baking soda, NaHCO3, with vinegar, C2H4O2, you get a clear colorless liquid and bubbles of CO2. What is the phase of each compound? Is this a chemical change? Why?
NaHCO3(s) C2H4O2(l) CO2(g) Yes it is a chemical change because new compounds are created.
400
True or False: Bromine is more reactive than Iodine.
True. In group 7A the reactivity decreases from top to bottom.
400
Which element would make the best coin (money): a) Phosphorus, P b) Silver, Ag c) Xenon, Xe
Silver because it is the only metal in the list. Phosphorus is a non-metal and is dull and brittle. Xenon is a gas so it can't be used as a coin.
400
What is a chemical formula and what does it tell you?
The chemical formula tells you the elements, how many of each there are, and the phase.
400
What is the scientific method and how does it relate to doing an experiment?
The scientific method is the way to answer a question you have. It relates to doing experiments because you follow the different steps of it to do your experiment. Ex: we start with a purpose or question, write a hypothesis, choose our materials, write a procedure, record observations, analyze our work, and then write a conclusion. The steps of the scientific method are the steps of doing an experiment too.
500
Iron and oxygen combine to make the compound iron oxide as shown by the equation below. Fe(s) + O2(g) → Fe2O3(s) This equation best demonstrates what important rule in chemistry?
The Law of Conservation of Matter
500
True or False: The atomic mass of the elements can increase while their size decreases.
True. As you go across a period, the mass increases while the size of the element decreases.
500
A "filament" is used in lightbulbs to conduct electricity. Which of these elements might be useful as a lightbulb filament? Why? a) Tungsten, W b) Sulfur, S c) Bromine, Br
Tungsten, W. It is the only metal in the list. Sulfur is a non-metal, so it doesn't conduct electricity well. Bromine is also a non-metal and it is a liquid.
500
What are four physical properties that your table has?
Possible answers: black, solid, long, non-metal, hard
500
Ms.D wants to add 0.12g of Salt to 300mL of water and heat it up. What equipment does she need in order to do this?
1) Spatula 2) Balance 3) Graduated cylinder 4) Beaker 5) Hot Plate 6) (Tongs)