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WorksheetsChemistry Chapters 0,1,2
Total questions: 16
Worksheet time: 24mins
Isotopes have ________
the same atomic mass.
the same number of protons but different numbers of electrons.
the same number of protons but a different number of neutrons.
the same total number of protons and neutrons.
What is the electron configuration of carbon?
[He] 2s2 2p4
1s2, 2s2, 2p2
1s1, 2s2, 2p4
1s2, 2s2, 2p6
How many significant figures are in 0.000345?
6 sig figs
7 sig figs
3 sig figs
4 sig figs
Calculate the wavelength of a photon that has a frequency of 2.5 x 10^12 Hz?
Don't know
3.34 x 10^7 nm
1.2 x 10^4 m
6.7 x 10^5 m
What is 250,000 in scientific notation?
2.5 x 10^-5
2.5 x 10^5
2.5 x 10^8
2.5 x 10^6
Which is a diatomic molecule?
CO2
NO3
H2O
O2
Which is untrue about Dalton's Atomic Theory?
Atoms are indestructible
Each element is made up of tiny particles
Chemical compounds are formed when atoms of different elements combine
Atoms are identical.
How many protons, neutrons and elections does Carbon 14 have?
6 : 8 : 6
8 : 6 : 6
6 : 6 : 8
5 : 4 : 5
Say you want to calculate frequency, what formula would you use?
E = hv
v = λ x c
λv = c
v = c / λ
What is planck's constant?
h = 6.626 x 10^-34
h = 2.9979 x 10^-18
h = 2.178 x 10^18
h = -2.178 x 10^18
Calculate the frequency of a photon that has a wavelength of 1.5 x 10^-8 m
2.0 x 10^-16 hz
1.33 x 10^-16 hz
2.5 x 10^19 hz
2.0 x 10^16 hz
A molecule ________
must contain at least two types of atoms.
can be an element or a compound.
cannot form a solid.
cannot be broken into its constituent atoms by any means.
What is the frequency of a photon with an energy of 3.5 x 10^-18 J? (formula: E=hv)
5.28 x 10^15 Hz
5.98 x 10^14 Hz
4.38 x 10^19 Hz
4.09 x 10^-19 Hz
What are cations?
Negatively charged ions
Neutral ions
electrons
Positively charged ions
What is the electron configuration for Br (bromine)
1s2, 2s2, 2p6, 3s2, 3p5
[Ar] 4s2, 3d10, 4p5
[Kr] 5s2, 4d10, 5p5
1s2, 2s2, 2p6, 3s2, 3p6, 4s2
What is the energy (E in joules) of the 714.5 nm photons emitted by an argon ion laser?
(*Remember this is a multiple step problem, converting nm to m, then finding the frequency to use it in a specific formula)
1.89 x 10^-19 J
2.78 x 10^-19 J
2.17 x 10^-18 J
3.47 x 10^-19 J
