States of Matter
If a scientist adds heat to a solid material so that it becomes liquid, what do we call the temperature at which this happens?
What is boiling point?
What are the 2 types of electrical charges?
What is positive and negative?
A substance that contains different elements or compounds?
What is a mixture?
A change in which the atoms or molecules in a substance stay the same.
What is a physical change?
Identify which of the following are properties of acids.
slippery, conduct electricity, bitter, chalky, gives up hydrogen ion
What is bitter, conducts electricity, gives up hydrogen ion?
What is H2O?
What is water?
True or false: Negative charges attract positive charges.
What is true?
What is an example of a chemical change?
What is wood burning?
Two or more atoms linked together to make a substance with unique properties.
What is a molecule?
Give an example of a base around the house?
What is baking soda?
What is the chemist most important tool?
What is the periodic table of elements.
The electrons orbit the nucleus of an atom in what is called at what?
What is an electron cloud, electron shell?
Can you tell the 3 main properties of a base?
What is taste chalky, are slippery, receive hydrogen ion?
A change that affects the type of molecules or atoms in a substance.
What is chemical change?
Give an example of an acid found around the house?
What is lemon juice?
What does Ph stand for?
What is potential hydrogen?
If an atom has 8 positively charged protons and 8 negatively charged electrons the overall charge of the atom would be what?
What is neutral?
When an atom gives away or takes an extra electron, it has an overall negative or positive charge and is called a what?
What is an ion?
The smallest unit of matter.
What is an atom?
What is an example of a physical change?
What is cutting a piece of paper?
If a liquid had a Ph of 7, what would that mean?
It is neutral.
Which of the following 2 subatomic particles are found in the nucleus of an atom.
What are protons and neutrons?
What is covalent bonding?
Anything that has mass and takes up space.
What is matter?
The atomic number tells how many what an atom has?
What are protons?