WorksheetsValence Electrons and Dot Diagrams
Total questions: 25
Worksheet time: 32mins
Nitrogen is in column 15 or Group 5A. Which of the following is the correct electron dot structure for nitrogen?
Match the following valance electron trends to their correct response.
Lose them
Few valance electrons (1-3)
Gain them
More valence electrons (5-7)
Keep them
8 valence electrons
Lose or Gain
4 valence electrons
Place the steps of making a Lewis Dot Diagram in the correct order
Write element symbol
Determine number of valence electrons
Visualize/draw box around symbol
Place one dot per side initially
Add dots up to 2 per side until all are used
Which of the following would have 2 valence electrons
Alkali metals
Alkaline earth metals
Halogens
Noble Gasses
Label the atom!
Electron cloud
Proton
Neutron
Electron
Nucleus
What atom does this Bohr Model represent?
(a)
What group does this element belong to?
1
2
17
18
This could be the dot diagram of
Al
Cl
C
Cl-1
This could be the dot diagram of
Na
Cl
B
Na+1
Atoms of the same element will always have the same number of ---
Ions have the same number of protons but different number of _________________
neutrons
electrons
protons
toes
Which of the following ions have a +2 charge?
Hydrogen (H)
Magnesium (Mg)
Calcium (Ca)
Lithium (Li)
Atoms in Group 13 have (a) valence electrons, so they will (b) electrons to form a +3 charge
Atoms in Group 16 have (a) valence electrons, so they will (b) electrons to have a -2 charge
Atoms in Group 17 have (a) valence electrons, so they will (b) electrons to have a -1 charge
Atoms in Group 2 have (a) valence electrons, so they will (b) electrons to have a +2 charge
All elements start out as (a) atoms. This means their number of protons and (b) is equal. When they gain or lose electrons, they become (c) ions and are no longer neutral. There are 2 types of ions: (d) which have a positive charge and (e) which have a negative charge.
Match the following
ION
atom with an electrical charge
CATION
loss of electrons
ANION
gain of electrons
Na+
example of an cation
Cl-
example of an anion
Which two atoms are elements that belong in period two in the periodic table?
Atom 3 and Atom 4
Atom 1 and Atom 4
Atom 3 and Atom 2
Atom 1 and Atom 2
What is the correct ion charge for Nitrogen?
(a)
What is the charge on the ion formed by Magnesium?
(a)
Match the generic Lewis Valence Electron Dot Structure with the elements that would have the same Lewis structure.
Na
Mg
Al
C
N
