Charge & Coulomb's Law
Mass number is equal to:
protons + neutrons
Which group of elements has 7 valence electrons?
halogens (group 17)
Draw the dot diagram for a lithium atom
Li.
What element has the greatest atomic radius?
Francium (Fr)
As distance to the nucleus increases, force of attraction:
Decreases
Charge is equal to:
protons minus electrons
nitrogen, phosphorus, arsenic, antimony, bismuth
Draw the dot diagram for a neon atom.
Ne (8 dots)
What element has the greatest electronegativity?
Fluorine (F)
As you move down a column on the periodic table, force of attraction:
Decreases as shells are added.
How many neutrons in an atom of oxygen - 18?
10
What neutral element has the following electron configuration: 1s22s22p63s23p1
Aluminum
Draw the dot diagram for a calcium ion.
Ca2+
Why does ionization energy increase across a column.
Addition of protons to nucleus (Coulombic attraction)
As you move across a row on the periodic table, force of attraction:
How many TOTAL electrons in a sodium ion?
10
What halogen ion has the following electron configuration: 1s22s22p6
fluorine (fluoride)
Draw the dot diagram for a magnesium ion.
Mg:
Why does atomic radius increase down a group?
Addition of electron shells (electron repulsion)
Electrons _____ as more shells are added, causing them to be further apart.
repel
How many neutrons in a hydrogen atom?
0
Why is oxygen attracted to a magnet?
It has 2 electrons with unpaired spins in its valence shell.
Draw the dot diagram for sodium bromide.
Na+1 [::Br::-1]
What group is uranium (U) in?
actinides