Periodic Table
What element is the symbol O?
Oxygen
What is matter?
Matter is anything that has mass and takes up space
What is a compound?
Pure substances that are made of TWO of more elements
What is a solution?
a type of homogenous mixture formed when one substance DISSOLVES in another
What is a physical change?
a change that does not cause a new substance to be made
What element is the symbol He?
Helium
Give me an example of something made of matter
Anything we see, smell, touch....
Is water a compound?
Yes; you have hydrogen and oxygen in water (2 elements)
What is the substance that is being dissolved called?
Solute
What is a chemical change?
Atomic number = _____________
Number of protons
What is an atom?
The smallest unit that makes up matter
What is a mixture?
two or more elements/compounds that are not chemically combined, can be separated by physical means
What is the substance that does the dissolving called?
Solvent
Is bleaching your hair chemical or physical change?
Chemical change
How do you find the number of neutrons in an element
Subtract the atomic mass by the atomic number
_________ cannot be broken down into anything smaller
Atom
Give an example of a heterogenous mixture
Oil & water, sand & pebble, anything that can be physically seen to be different substances
What is the universal solvent?
Water
Is boiling water a physical or chemical change?
Physical change
Find the number of neutron if Nitrogen has an atomic number of 7 and an atomic mass of 14
Is light matter?
No it is not, it is a form of energy
Give an example of a homogenous mixture
a mixture that appears to be the same throughout like toothpaste, milk, mayo...
A student added some sugar to a glass of water, but it did not dissolve quickly. What can the student do to increase the rate at which the sugar dissolves in the water?
Heat the water
What is a proton, neutron, and an electron?
Structures of the atom includes...proton: positive charge, neutron: no charge, electron: negative charge