Chemistry Review Terra Nova

acids have a ph above 7.

like charges attract and opposite charges repel.

how much volume is in the graduated cylinder?

In liquids that are very dense the particles are_______________________.

baking soda and vinegar bubble and produce gas.  This is a _____________ change.

how much matter or stuff is in a substance

the amount of space taken up by a substance or object

a sink/float graph shows objects that sink ________________ the density of water line.

a substance with a bitter taste and ph range of 7.1-14

the atomic number tells you the number of protons and electrons in an element

a substance with a sour taste and a ph range of 0-6.9

how many atoms of hydrogen are in the reactants<

reactants break their bonds and rearrange to form new substances called products

The smallest unit of matter

In the equation - how many molecules of oxygen are there?

what is the mass of the rock?

A scale used to measure acids and bases

To find neutrons subtract the atomic number from the ___________________.

how many atoms are in 4H₂O?

carbon, gold, silver, oxygen are all examples of ______________.

atoms that have the same number of protons have different properties

How many molecules are in 6 H₂O?

two or more different types of atoms  chemically bonded together to form a new substance

made out of one type of atom - found on the periodic table

what type of bond is shown?

a liquid that is more dense will float on top of a less dense liquid

hand soap is a common base.

crushing a can is an example of a ________________ change.

Which of the following densities would have molecules packed more tightly together?

water can be seperated into oxygen and hydrogen using electrolysis.

atoms that have a covalent bond share electrons

chemical changes are easy to reverse

neutrons are found in the nucleus and have a zero charge

mixtures and solutions are formed through ___________________ changes.

a rusty nail is an example of a _________________ change.

Which can't be separated?

saltwater and fruit salad are examples of ____________________.

anything that has mass and takes up space

The equation for a chemical reaction is balanced and show which law?

The study of matter and how matter behaves

A change in size or shape of substance

a change that takes place at the atomic level and produces new substance

density equals mass divided by ______________________.

How many different elements are in sodium bicarbonate - NaHCO₃

density does not depend on the size or quantity of matter

two or more like or unilike atoms that are bonded together.

compounds are formed through ______________ changes.

The right side of the equation shows what?

a wooden block sinks in water has a density less than 1.0 g/ml.

when a substance is heated the density will _______________.

burning a candle is an example of a _____________ change.

made out of different substances that can be separated back into the original substances