Particles
What are the three (most common) states of matter?
Solid, liquid, and gas
What are the three main subatomic particles in an atom?
Protons, neutrons, and electrons
What does the chemical symbol 'O' represent?
Oxygen
Which state of matter has a definite shape and a definite volume?
Solid
A student has a cup of ice. The ice melts into liquid water. Did a new substance form?
In which state of matter for particles have the most freedom to move around?
Gas
Which subatomic particles has negative charge?
What information does the atomic number on elements of the period table tell you?
The number of protons in the atom (and therefore, also the number of electrons usually)
What's the difference between a molecule and a compound?
A molecule is two or more atoms bonded together, and a compound is made of atoms of two or more elements bonded together.
A mystery substance has a definite volume but takes the shape of its container. What state of matter is it in?
Liquid
Is melting ice a physical change or a chemical change? Explain why.
Where are protons and neutrons found in an atom?
Is gold (Au) an element or a compound?
An element
Is salt water a mixture, an element, or a compound?
A mixture
A student mixes sand and water. Can the sand and water be separated using physical methods? What type of matter is this? A compound or a mixture?
A piece of paper is burned and turns into ash and smoke. Is this a physical or chemical change?
Chemical change, because new substances are produced.
An atom has 8 protons and 8 electrons. What is its overall charge?
Neutral (0 charge)
What do elements in the same column on the Periodic Table usually have in common?
They have similar chemical properties
Is water (H20) an element, molecule, or compound?
A student pours the same amount of water into a wide bowl and a tall glass. Did the amount of matter change?
No
A student observes that a mystery substance is shiny, can be hammered into a thin sheet and conducts electricity. Is this describing a physical property or a chemical property?
Physical property because these things can be observed with the senses WITHOUT mixing the substance together with something else to create new substances.
An atom has 11 protons and 12 electrons. What is its overall charge?
-1. It is more negative than positive by 1 point.
A mystery element is shiny, conducts electricity, and can be hammered into different shapes. Is it most likely a metal, nonmetal, or metalloid?
A metal, because metals are typically shiny, good electrical conductors, and malleable.
A substance has the formula C02. Name the elements that make it up and tell whether it's an element, molecule, compound, or mixture.
Carbon and oxygen; it is a molecule and a compound
Two samples are made from the same substance. Sample A is solid and Sample B is gas. What is different about the particles in the two samples?
The particles are the same substance but they have a different amount of energy, movement, and spacing. In the solid, they are close together and vibrate. In the gas, they move much faster and are far apart.