WorksheetsPeriod Group Valence
Total questions: 58
Worksheet time: 1hrs 13mins
What are valence electrons?
The total number of electrons in an atom
The number of electrons in the outermost shell
The number of electrons in the second shell
The number of protons in the outermost shell
Which elements have the most similar chemical properties?
boron and carbon
oxygen and sulfur
aluminum and bromine
argon and silicon
All atoms are most stable with (or would "prefer") how many electrons in their valence shell?
1
2
8
18
When trying to identify an unknown element, a scientist determines what other elements reacts with chemically. Which property of the unknown element determines the other element it reacts with?
The total number of neutrons in the unknown element
The total number of particles in the nucleus of the unknown element
The number of protons in the nucleus of the unknown element
The number of valence electrons in the unknown element
What groups are the most reactive metals?
2 and 3
1 and 18
1 and 2
16 and 17
What groups are the most reactive non metals?
1 and 2
16 and 17
2 and 17
1 and 16
Why are halogens so reactive?
They want to get rid of their only valance electron
They only need one more electron
They are non reactive, they have a full shell
How do electrons of an element determine that element's reactivity?
If the valence shell has missing electrons it is very reactive to attract or lose more electrons.
If the valence shell has a full ring of electrons it is very reactive because it needs more.
If the valence shell has a full shell of electrons it is very reactive because it is already full.
If the valence shell has missing electrons it is not reactive because it is missing electrons.
Valence electrons are electrons in the shell
furthest from the nucleus
closest to the nucleus
having the lowest energy level
that has the fastest electrons
Choose the correct number of valence electrons for Barium
1
2
3
4
How many valence electrons in Oxygen?
5
6
7
8
What is the charge of a Francium cation?
0
+1
+2
-1
Ions are
atoms that have gained or lost a proton
atoms that have gained or lost a neutron
atoms that have gained or lost an electron
any atom
Cations have a __________ charge, anions have a _____________ charge.
positive, negative
negative, positive
negative, neutral
neutral, positive
How many valence electrons does Helium have?
1
2
3
8
What are the elements (Be, Mg, Ca,...) in group 2 called?
Alkali metals
Alkaline earth metals
Halogens
Nobel Gases
Which spdf electron configuration is correct for an element with the notation: 2 - 8 - 8 - 2?
1s2 2s2 2p6 3s2 3p6 4s2
1s2 2s2 2p6 3s2 3p6 3d2
2s2 2p6 3s2 3p6 4s2
1s2 2p8 3p8 4s2
Why is 2-8-18-8-1 more stable then 2-8-18-9?
2-8-18-8-1 has more energy levels
2-8-18-8-1 has fewer electrons
2-8-18-8-1 has full shells or half-full subshells which are more stable than incomplete subshells.
2- 8-18-8-1 has more valence electrons
Which of the following is false about covalent bonds?
Forms by sharing electrons
Forms between 2 nonmetals
Represented by a line between atoms
Forms by transferring electrons
Which list of elements contains a metal, a metalloid, and a nonmetal?
Ag, Si, I2
Ge, As, Ne
K, Cu, Br2
S, Cl2 , Ar
The elements on the Periodic Table are arranged in order of increasing...
mass number
atomic number
number of isotopes
number of valence electrons
An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity?
carbon
fluorine
nitrogen
oxygen
How many pairs of electrons are shared between the nitrogen atoms in a molecule of N2?
1
2
3
6
Elements that have atoms with stable valence electron configurations in the ground state are
Group 1
Group 2
Group 17
Group 18
Which Group 15 element exists as diatomic molecules at STP?
phosphorus
nitrogen
bismuth
hydrogen
