1. AND
The Periodic Table C

2. particle
element
Atomic Theory

3. said atoms were small hard balls that could not be divided+ e-
said atoms had negatively charged electrons set in a positive sphere + e- + e- + + e- e- + + e- e-
was surprised that a few particles were deflected strongly 3+ e- e-
said electrons move in specific orbits around the nucleus of an atom e- e- 3+ e- e- e-
said electrons move rapidly
in different directions
around the nucleus 6+

4. atom
nucleus
protons
neutrons
nucleus
electrons

5. A small particle in the nucleus of the atom, with no electrical charge
Cloud of Electrons
An electron is a tiny, negatively charged particle that moves around the nucleus of an atom
Neutron
A small particle in the nucleus of the atom, with no electrical charge
Nucleus
The central core of an atom containing protons and usually neutrons
Proton
A proton is a small, positively charged particle in the nucleus of the atom.

6. There are the same number of protons and electrons!
The positive charge equals the negative charge.
This atom is neutral!
Protons are shown by a plus sign.
They have a charge of +1.
Electrons are shown
by the symbol e-.
Neutrons don’t affect the charge of an atom because they have a charge of 0.
They have a charge of -1.

7. element 7 8 9 10

8. an atom with the same number
isotopes
isotope
an atom with the same number
of protons and different numbers of neutrons.
mass number
the sum of the protons and
neutrons in the atom

9. positive and negative charges attract
valence electrons
chemical reactions
positive and negative charges attract

10. valence electrons
valence electrons
isotopes

11. Periodic Table of Elements
Atomic mass
Periodic Table

12. This is the number of protons it has!
Chemical
Symbol
Atomic
Number
This one or two letters!
This is the number of protons it has!
Atomic
Mass
The average
mass of one
atom of an
element
Element
Name

13. Periodic Table of Elements
energy shells

14. Electrons in the outer energy shell
group
Element
Name
group
Electrons in the outer energy shell
family
periodic table

15. Metals
shiny
bendable

16. is shiny and reflective can be hammered or rolled into shapes
can be pulled into long wires
attracted to certain metals/magnets
ability to transmit heat or electricity
ability of an object to
transfer heat
ability of an object to
carry an electric current
the speed that an element reacts with another substance
the deterioration of a metal due to a chemical reaction

17. Nonmetals
hydrogen
poor conductors of electricity
usually have lower densities
they usually gain or share electrons
when they react with other atoms

18. Most nonmetals are gases at room temperature.
Carbon Family
Nitrogen Family
Oxygen Family
Halogen Family
Noble Gases
Hydrogen
Most nonmetals are gases at room temperature.
Metalloids have some properties of metals and some properties of nonmetals.

19. C