Elemental Symbol
What is the chemical symbol for hydrogen?
H
What is the smallest unit of an element that retains that element’s identity?
Atom
Count the total atoms in one molecule of C₂H₆O.
9 atoms: 2 carbon + 6 hydrogen + 1 oxygen
A change in size, shape, or state that does not form a new substance
Physical Change
Which type of property depends on how much matter you have: intensive or extensive?
Extensive
How many sons does Mr. Robbins have?
2
What is the chemical symbol for carbon?
C
In a neutral atom, which two particles have equal numbers?
numbers?Protons and electrons
How many carbon atoms are in one formula unit of Na₂C₂O₄?
2 carbon atoms
A change that forms one or more new substances
Chemical Change
Is density an intensive or extensive property?
Intensive—it does not depend on the amount of the substance.
What are Mr. Robbins' son's names?
Tyler and Trevor
What is the chemical symbol for nitrogen?
N
Which two particles are in the nucleus, and what are their charges?
Protons: positive. Neutrons: no charge.
Hydrogen and chlorine chemically bond to form hydrogen chloride. Is the product an element, compound, or mixture?
A compound
Which is a chemical property: color, density, conductivity, or flammability?
Flammability
Water boils and bubbles appear. Is this a physical or chemical change?
Physical—the bubbles contain water vapor; no new substance forms.
Where did Mr. Robbins live for 23 years before moving back to NC?
Maine
What is the chemical symbol for calcium?
Ca
Where are electrons located, and what charge do they have?
Shell/Outside the nucleus, electron cloud
Negative
What term describes all these materials: saltwater, vinegar, bronze, air, and beach sand?
Mixtures
Zinc reacts with acid and produces bubbles of a new gas. Is this a physical or chemical change?
Chemical; the formation of a new gas supports that a new substance formed.
How many total atoms are in one formula unit of FeC₅O₅?
11 atoms: 1 iron + 5 carbon + 5 oxygen
How old is Mr. Robbins?
59
What is the chemical symbol for krypton?
Kr
Using carbon’s atomic number of 6 and rounded atomic mass of 12, how many protons, electrons, and neutrons are in a neutral carbon atom?
6 protons, 6 electrons, and 6 neutrons
A small number written below and to the right of an element’s symbol in a chemical formula. It tells how many atoms of that element are present.
Subscript
Saltwater evaporates, leaving salt behind. Is this a physical or chemical change?
Physical—the salt was already present; no new substance forms.
You divide a sample of water into two equal portions. What happens to the volume and density of each portion?
Each has half the original volume, but the same density at the same temperature.
Bonus Question - All groups can answer
Every correct answer gives you 500 points -
What are the character names from the book series that Mr. Robbins published? (there are 4)
What is the chemical symbol for copper?
Cu
What are atoms with a positive or negative electrical charge called?
ION
What is the difference between a homogeneous mixture and a heterogeneous mixture?
Homogeneous: uniform throughout. Heterogeneous: not uniform throughout.
Matter is not created or destroyed. The total mass stays the same when all matter is accounted for.
Law of Conservation
Which subatomic particle determines an atom’s atomic number as an element?
The proton—the number of protons identifies the element.
What did Mr. Robbins collect that he has about 6000 of?
Comic books
What is the chemical symbol for oxygen?
O
Carbon’s periodic table tile shows 6 and 12.011. Which is its atomic number, and which is its atomic mass?
6 is the atomic number; 12.011 is the atomic mass.
How can you separate dissolved salt from saltwater to recover the salt?
Allow the water to evaporate.
A candle is burning. What kind of change is melting wax, and what kind is burning the wick?
Melting wax: physical. Burning the wick: chemical.
If an element has no subscript after its symbol in a formula, how many atoms of that element do you count?
One atom
What other job does Mr. Robbins have besides being a teacher?
Graphic Designer