Periodic Table Trends
Noble gases are in group/column ____.
Group 8
If an element has 9 protons and 10 electrons, its atomic number is _____.
9 (look only at protons)
What is the name for column 1?
Alkali Metals
Periods in the periodic table are the vertical rows and Groups are horizontal
FALSE; Periods are horizontal. Groups are columns.
Iodine
Which of the following has the highest ionization energy? Na, F, Ba
F
protons and neutrons are located in the _________.
NUCLEUS
Iridium-190 and Iridium- 194 are examples of ______
ISOTOPES!
Chlorine will lose an electron to become a positive ion.
FALSE: Chlorine will GAIN and electron to become a negative ion (-1)
Valence electrons are located ______________.
in the outer shell.
Which of the following has the highest atomic radius? Ba, Al, Ne?
Ba
Which of the following DOES NOT carry an electric charge?
a. electron
b. proton
c. neutron
NEUTRON
Atomic radius means ______.
How big an atom is.
Calcium has 2 valence electrons
TRUE
Mass number is determined by adding _________ and ____________
protons and neutrons
Which of the following atom has the highest electronegativity? Ne, Sn, Fr?
Ne
Helium, Neon, and Argon have _____ valence electrons.
8
Isotopes change the
a. proton
b. electron
c. neutron
C. NEUTRON
Ions change electrons, but do not change charge
FALSE: ions change electrons AND change charge
The mass of an element that has 13 protons and 13 neutrons is _____
26.
What is electronegativity?
The ability of an atom to pull electrons towards itself in a bond
During a chemical reaction, Sulfur is likely to lose/gain _____ number of electrons to become a ____ ion.
Gain 2 electrons to become a -2 ion
What two ways can you determine the number of valence electrons in an element?
1. By looking at the group number
2. By counting the outer electron shell
Cation has negative charge, anion has positive charge
FALSE: cation has positive charge, anion has negative charge
Properties of metals include...
- malleable
-good conductors of heat
-able to lose electrons
-have luster