Vocabulary
True or False. Electrons have a positive charge.
False
The horizontal rows on the periodic table are called__________
Periods
Which state of matter has a definite shape and volume?
Definite: Can not be changed.
Solid
H
element
True or False.
Protons have a positive charge.
True
The vertical columns on the periodic table are called ______________________.
Groups
Name the three states of matter.
Solid, Liquid, Gas
Two hydrogen atoms
molecule
The smallest unit of an element and of matter is ___________
Atom
True or False
In an atom the number and protons and electrons are the same.True
How many periods are there in the periodic table?
7
Which state of matter is found in balloons?
gas
Au
Element
What are the three particles that make up an atom?
Proton, Neutron, Electron
true or false
Neutrons are not found in the nucleus.
False
How many groups are there in the periodic table?
A liquid takes the shape of the container.
H20
Compound
What is the name of the center of every atom and contains at least one proton?
Nucleus
What kind of charge does an electron have?
The atomic number of an element shows us the number of ________________
protons
Describe the atoms of a solid.
The atoms that make up a solid are close together.
NaCl
Compound