BJU 6th Grade Science Chapter 7

When positively and negatively charged ions attract each other they form...

A substance; only one kind of atom

bitter taste

A substance that changes color when exposed to acid or base solutions is called an

an atom that has gained or lost electrons

baking soda, soap, bleach

the study of matter-what it is made of, what its usual characteristics are, how it reacts ...

can burn, can be corrisive

Scientist ______ developed a simplified model of at an atom.

the process in which different types of atoms join and form a new substance

chemical symbols and numbers abbreviating the name of a compound

acid or base? Lemons, vinegar, tomato juice

an ionic compound produced from a reaction between an ACID AND a BASE

The compound H2CO3 has ______ atoms of Carbon in it

You can determine the concentration of acids or bases in a solution by using _____

If the element copper has 29 protons, how many electrons does it have?

based on the number of protons in the nucleus

slippery to the touch

The sum of the number of protons and neutrons results in an atom's approximate _______.

the smallest piece of an element that can be recognized as that element

Explain why all compound are molecules but not all molecules are compounds

sour taste

A ____ reaction occurs whtn a compound is BROKEN DOWN into simpler compounds.