The Atom

1
The Atom

• Ch.17 Sec.1

2
Atom

• Contain a nucleus, protons, neutrons, and
  electrons

3
Nucleus

• Center of atom
• Positive () charge
• Contains protons and neutrons

4
Protons (p)

• Protons Positive Charge (1)
• Relative Mass
• 1 (compared to other subatomic particles)
• Actual Mass
• 1.674 x 10-24
• Location nucleus
• Number of protons varies w/ ea. element

5
Neutrons (no)

• Neutrons Neutral Charge (none or zero)
• Relative Mass
• 1
• Same as proton
• Actual Mass
• 1.675 x 10-24
• Same as proton
• Location nucleus
• Same as proton

6
Electrons (e-)

• Electron Negative charge (1-)
• Relative Mass
• 1/1836
• Actual Mass
• 9.11 x 10-28
• Location electron clouds or orbits
• Constantly move around nucleus

7
Atoms Are Neutral

• of Protons () of Electrons (-)
• Neutrons do not matter because they do not have a
  charge
• Ex Helium
• 2 P - (2)
• 2 N - (0)
• 2 E - (-2)
• 0 overall charge

8
Neutral Atom

• 3 Protons (3)
• 4 Neutrons (0)
• 3 Electrons (-3)
• 0 overall charge

9
Changing Particle s

• Cannot change p (diff. element)
• n0 can change (neutral dont matter)
• Isotope
• E- can change
• Lose, gain share e- when bonding