Safety and Data
True or False:
Never touch or taste unknown chemicals.
True
The state of matter for an object that has neither definite shape nor definite volume is
gaseous (gas)
Who proposed the atomic theory in 1803?
John Dalton
Of the following, __________ radiation has the longest wavelength and __________ radiation has the greatest energy.
gamma ultraviolet visible
visible and gamma
Which scientist predicted the existence and properties of three undiscovered elements
Dimitri Mendeleev
If you are transferring a small amount of solution you may use
pipette
Physical or Chemical change:
Condensation of water vapor on a glass
Physical
Explain the difference between isotope and ion.
Ion is when an atom loses or gains electrons to have a positive or negative charge
Isotope when atoms has same number of protons but has different number of neutrons
An atom contains 25 electrons. When the atom is in the ground state , how many different principal energy levels (n) will contain electrons?
4
Metal or Nonmetal:
Calcium
Metal
how many decagrams are in 1065 milligrams
0.1065 Dg
What mass of mercury (density is 10.6g/mL) will occupy a volume of 32.00 mL
339.2 (339g/ml)
Protons 24
Neutrons 28
Electrons 24
Which rule is a statement that electrons fill lowest energy orbitals first is the
Aufbau principle
In what group can we find Alkaline earth metals?
Group 2 (2a)
Written in scientific notation, the measurement 0.000065 cm is
6.5 x 10-5 cm
A substance that is made of one type of atom is called
element
Name the three subatomic particles, their charge and location in the atom
Proton (+) nucleus
Neutron (=) nucleus
Electron (-) orbitals/shell/electron cloud
What is the electron configuration of Iron
1s2 2s2 2p6 3s2 3p6 4s2 3d6
Which of the following elements has the lowest electronegativity?
Al
P
Ar
Cl
1. Al
During a laboratory activity a student combined two solutions. In the laboratory report, the student wrote “a yellow color appeared”. The statement represents the student’s reported
qualitative observation
An example of a chemical change is
A. an ice cube melting in a drink B. coffee spilled on a shirt
C. digesting a pizza D. boiling alcohol
C. Digesting a pizza
What is the average atomic mass of zinc with the following masses and percent abundances?
Mass Abundance
67.925 amu 47.29%
69.925 amu 0.62%
63.929 amu 52.00%
65.926 amu 0.089%
35.86 amu
At maximum, an f-subshell can hold __________ electrons, a d-subshell can hold __________ electrons, and a p-subshell can hold __________ electrons.
14, 10, 6
How does a covalent bond differ from an ionic bond?
Covalent bonds are between two nonmetals and they share electrons. Ionic bonds are between a metal and nonmetal and electrons are transferred.