Symbols
What is the chemical symbol for Sodium?
Na
What is the first element in the periodic table?
Hydrogen
What does the arrow point to in a chemical equation?
The products.
Is ice melting a physical or chemical change?
Physical
How many months have 28 days?
All of them
What element has the Symbol K?
Potassium
Which atom is heavier: Carbon or oxygen?
Oxygen
Is H20 an element, compound or mixture?
Compound
Two substances are mixed and light is produced. Chemical or Physical Change?
Chemical
DOUBLE POINTS: 10 SECONDS TO ANSWER
What do you put in a toaster?
What do cows drink?
Bread
Water
NaCl is the chemical symbol for what common household item?
Table Salt
What is the difference in regards to particle arrangement between a solid and a gas?
Gasses take up the volume of a container, they have greater distances between particles.
Solids have a fixed volume and have less space between particles.
What happens to the particles when you cool an object?
Their vibrations slow down and they contract
Is orange juice an element, compound or mixture?
Mixture
What did the scientist say when he found 2 atoms of helium?
HeHe
Air is made up of the following elements and compounds: N2 O2 CO2 H2O Ar. Name them all.
Nitrogen Oxygen Carbon Dioxide Water Argon
What happens to iron when it is exposed to oxygen in the presence of water?
Rust
What is chemistry?
the branch of science concerned with:
- the substances of which matter is composed
- their properties and reactions
- the use of such reactions to form new substances.
What is the boiling point of water?
100 degrees
What is the center of gravity?
The letter 'v'
What is the full name for the following element symbols?
O
C
Cl
Oxygen, Carbon, Clorine
How do know the atomic weight and atomic number of elements? HINT: subatomic particles.
Weight: number of neutrons + number of protons
Number: number of protons/electrons
What is the difference between a chemical change and a physical change?
New substances are formed in chemical reactions, they require/emit energy.
Physical changes can be a change of state, form or shape as long as no new substance has been formed.
A marshmallow is toasted over a campfire. Chemical or Physical change?
Chemical
What is the chemical symbol for Gold?
Au