WorksheetsChemistry Midterms!!!! (end my misery)
Total questions: 26
Worksheet time: 40mins
What is the equation for finding density?
D = m/v
D = w/f
D = h/m
none of these you dumb dumb
You have a block of material with a mass of 500 grams, and you measure its volume to be 250 cubic centimeters.
(a)
you have a liquid with a density of 1.2 g/cm3 and a volume of 150 cm3. what is the mass?
(a)
you have a solid object with a density of 0.8 g/cm3 and a mass of 400 grams. what is the volume?
(a)
What is an Atomic Radius?
measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound.
measure of the distance between the center of the nuclei of two ions that barely touch.
half the distance between the nuclei of identical atoms that are bonded together
The energy required to remove one electron from a neutral atom of an element
What direction on the periodic table do you need to go to in order for the atomic radius to increase?
Left to right
Right to left
Top to bottom
Bottom to top
Atomic radii cannot be measured directly because the electron cloud does not have a defined ____.
Mass
Charge
Outer edge
Probability
What is Ionic Radius?
measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound.
measure of the distance between the center of the nuclei of two ions that barely touch.
half the distance between the nuclei of identical atoms that are bonded together
The energy required to remove one electron from a neutral atom of an element
What direction on the periodic table do you need to go to in order for the ionic radius to increase?
Left to right
Right to left
Top to bottom
Bottom to top
Where does the anionic energy stop increasing?
Period 8
Period 13
Top to bottom
Period 12
Where does the cationic energy start increasing?
Period 8
Period 13
Top to bottom
Period 12
The ionic radii of the ions S2-, Cl- and K+ are 184, 181, and 138 pm respectively. Why do these ions have different sizes even though they have the same number of electrons?
Consider these iso electronic species Na+ Mg2+ F- and O2-. The correct order of increasing length of their radii is
A- F- O2- Mg2+ Na+
B- Mg2+ Na+ F- O2-
C- O2- F- Na+ Mg2+
D- O2- F- Mg2+ Na+
A
B
C
D
What is Electronegativity?
measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound.
measure of the distance between the center of the nuclei of two ions that barely touch.
half the distance between the nuclei of identical atoms that are bonded together
The energy required to remove one electron from a neutral atom of an element
What direction on the periodic table do you need to go to in order for Electronegativity to increase?
Left to right
Right to left
Top to bottom
Bottom to top
Rank the following in order of decreasing electronegativity:
A- Na, Li, K
B- K, Sc, Ca
C- As, Sn, S
A
B
C
edit when you have an answer
What is Ionization Energy?
measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound.
measure of the distance between the center of the nuclei of two ions that barely touch.
half the distance between the nuclei of identical atoms that are bonded together
The energy required to remove one electron from a neutral atom of an element
What direction on the periodic table do you need to go to in order for ionization energy to increase?
Left to right
Right to left
Top to bottom
Bottom to top
What is the 2nd ionization of O?
O ----> O1+ + O2+
O2+ ---> O1+ + e-
O1+ → O2+ + e-
A(n) _____ is an atm, or bonded group of atoms, that has a positive or negative charge
Halogen
Ion
Isotope
Molecule
How many orbitals are in sublevel s
1
2
7
6
How many orbitals are in sublevel p
4
2
3
6
How many orbitals are in sublevel d
7
5
14
10
How many orbitals are in sublevel f
7
5
14
10
What is the equation for determining how many electrons are in each energy level?
(a)
What is the equation for determining how many electrons are in each energy level?
(a)
