6th Grade Science -Chapter 7

Formed when an acid and a base neutralize each other.

How many atoms of hydrogen are in H2CO3? 

Forms hydrogen ions when dissolved in water.

Molecules formed from two or more different elements are called___________.

What are the outer yellow dots called?

bitter taste

The atomic mass is the approximate number of _______ and ________.

Bonding that happens when atoms share pairs of electrons.  

Classification system of elements.  

Strong acids that can burn the skin.  

The horizontal rows on the periodic table of elements are called___________. 

__________ is what scientist think about atoms.

The combination of gases hydrogen and oxygen form the compound we call _________.

A group of atoms joined together chemically.  

antacid tables

Chalk

What does the number on the bottom represent on this periodic cell?  

What are the red dots in the center of this atom called? 

Smallest piece of an element.

The red and green dots in the center of this atom make up the ____________. 

sour taste

Chemistry is the study of ___________.

The Russian chemist who is responsible for developing a way to organize element is __________.

What are the green dots in the center of this atom called? 

Atom smashing machine.

What does the number 8 represent on this periodic cell?  

Substances containing only one kind of atom are called __________.

Helps digest food in the stomach.

Usually composed of a metal and a nonmetal.

If the element of sodium has 11 protons, how many electrons does it have?

Electrons travel around the nucleus of the atom in a space called a _______. 

The atomic number is based on the number of _______ an element has.

Substance with only one kind of atom. 

Slippery to touch.

_______ make it easier for scientists from all over the world to communicate about elements.  

What does the letter O represent on this periodic cell?  

The study of matter is called_________.

What does the word Oxygen represent on this periodic cell?  

An atom that gains or loses electron.

Which scientist developed a simplified model of an atom?

A substance that changes color when exposed to acid or base solutions is called a (n)________.