It's about the number!
How many significant figures are there in 0.02020?
4
This is a chart which organizes the chemical elements.
the periodic table
Atoms are composed of these 3 subatomic particles?
protons, neutrons and electrons.
Matter is everything
True or False? Explain.
What is the electron configuration for Li?
1s^2 2s^1
1
This represents the number of protons in the nucleus of an element
The atomic number
Particle with a neutral charge in an atom.
neutron
What is the electron configuration of Al?
1s2 2s2 2p6 3s2 3p1
What is 1.25 + 3.10000 + 5
9.35
Name of group IA
Center of the atom that makes up most of the atom's mass.
nucleus
This is when a gas changes to liquid
condensation
What four letters represent the orbitals?
s p d f
Convert the following to scientific notation:
12.5 x 10-5
1.25 x 10-4
What is the name of elements in column 3-12?
Transition elements or transition metals
The nuclear symbol of an atom that has 12 protons, 13 neutrons and 10 electrons.
25Mg2+
Sugar dissolved in water is a chemical change
True or false?
Explain.
False
How many electrons can a d orbital have?
10
What is
(25.1 - 12.250 ) / 2.526 =
5.11
What is the name of the group and group number of the group that has the most stable elements?
Noble gas, group 18 or VIIIA
Atoms of Ca-41, K-41 and Ar-41 have the same number of neutrons
True or False?
Explain your answer
False
Ca-41 : mass number is 41. # neutrons = 41 - 20 = 21
K-41 : mass number is 41. # neutrons = 41 - 19 =22
Ar-41 : mass number is 41. # neutrons = 41 - 18 =23
A measure of how much mass is contained in a given unit volume.
Density
What is the element that has this configuration: [Xe] 6s^1 4f^14 5d^10?
Hg or mercury