Boyertown Area School District · Web viewKEY Chapter 4-2 Review Atoms, Isotopes and Ions neutron...
Transcript of Boyertown Area School District · Web viewKEY Chapter 4-2 Review Atoms, Isotopes and Ions neutron...
KEY Chapter 4-2 Review Atoms, Isotopes and Ions
Complete the diagram of an atom below with these terms; nucleus, proton, neutron, electron, 1st energy level, 2nd energy level. The electrons are located in the _electron cloud_ _ .
Properties of Subatomic Particles (pg 109)particle Symbol Relative charge Relative mass (atomic mass units or amu)proton P+ +1 1neutron n 0 1Electron e- -1 0
Definitions
Atomic mass- average mass of all the isotpes of an element
Atomic number- number of protons in the nucleus
Mass number- neutrons + protons in the nucleus
Atom- smallest particle of an element
Isotope- atoms of a given element that have different numbers of neutrons and different mass numbers.
Ion- an atom or isotope that has positive or negative charge
Questions
proton
2nd energy level
nucleus
1st energy level
electron
neutron
1. List the charge and location of protons, neutrons and electrons in an atom.
protons positive one, Nucleus Elecrons- negative one, -1, in electron cloud
neutrons no charge, nucleus2. List the relative mass of protons, neutrons and electrons in an atom. Relative mass means the mass compared to
the other particles.
Protons, neutrons 1 atomic mass unit (amu),
electrons have a mass of 0 amu
3. Label this “symbol square” with these words; net charge, mass number, and atomic number, symbol of ele
How many electrons fit in each energy level?
first – 2 maximumsecond – 8 maximumthird - 18 maximum
5. Describe how to calculate the number of protons and neutrons in an atom using the atomic number and the mass number.
Protons = atomic numberNeutrons: mass number – atomic number (larger number – smaller number in “symbol square”)
6. Describe how to calculate the number of electrons from the net (overall) charge.Protons – electrons = net charge
7. Describe the similarity between each atom and its isotope.
Same # OF PROTONS, But different # of neutrons & different mass numbers
8. What pattern do you see with the subatomic particles (protons, neutrons, and electrons) in each of the ions that you created?
Protons ≠ electronsProtons & neutrons unchanged
KEY Neutral Atom (stable form) Isotope (stable form) Ion (stable form)
Net Charge
Atomic numberOr number of protons
Mass number
Symbol of element H - hydrogen
2) name _____________ p+ = 2 n= 1 e - 2
none none
3) name _____________ p+ = _____ n= _____ e - ______
p+ = ____ n = _____e - _____
p+ = ____ n = _____e - _____
4) name _____________ p+ = _____ n= _____ e - ______
p+ = ____ n = _____e - _____
Unstable
p+ = ____ n = _____e - _____
5) name _____________ p+ = _____ n= _____ e - ______ p+ = ____ n = _____e - _____
p+ = ____ n = _____e - _____
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Neutral Atom (stable form) Isotope (stable form) Ion (stable form)
6) name _____________ p+ = _____ n= _____ e - ______
p+ = ____ n = _____e - _____
p+ = ____ n = _____e - _____
7) name ____________ p+ = _____ n= _____ e - ______
p+ = ____ n = _____e - _____
p+ = ____ n = 7e - 10
8) name _____________ p+ = _____ n= _____ e - ______ p+ = ____ n = _____e - _____
p+ = ____ n = _____e - _____
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-4
-3
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9) name _____________ p+ = _____ n= _____ e - ______
p+ = ____ n = _____e - _____
NONE
p+ = ____ n = _____e - _____
10) name ___________ p+ = _____ n= _____ e - ______
p+ = ____ n = _____e - _____
p+ = ____ n = _____e - _____
Describe the pattern in the way that the electrons are organized on the atoms. You may use your textbook for help.
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First energy level filled w/2 electrons; second energy level filled with 8 electrons
What pattern do you see with the subatomic particles (protons, neutrons, and electrons) in each of the neutral atoms that you created?
Protons = electrons Protons + neutrons = mass number