Le atom
What does the atomic number represent?
The number of protons
What is a period on the periodic table?
What is a group on the periodic table?
A horizontal row
A vertical column
What is an orbital?
A region where electrons are likely to be found
What is an electron-dot (Lewis) symbol?
A diagram showing valence electrons as dots
what do you need to remember converesions on the test?
10 conversions,
8 of the power of 10s
2 cm to in and mL to cm^3
What is mass number?
Number of protons plus neutrons
What group are alkali metals in?
Group 1A
How many electrons can an orbital hold?
2
How are Lewis dots placed?
One per side until four, then paired
nano
10^9
What is an isotope?
Atoms with the same number of protons but different numbers of neutrons
What determines chemical properties?
Number of valence electrons
What shape is an s orbital?
Spherical
Deci
10^1
pico
10^12
Who proposed the atomic theory?
John Dalton
How many valence electrons do Group A elements have?
Same as their group number
How many s orbitals per energy level?
One
Mili
10^3
mL to cm cubed
1 to 1
What is Coulomb's Law?
Electrical force depends on charge size and distance
Group and Period of Tin (Sn)
column 14
period 5
What shape is a p orbital?
Two-lobed
Mega
10^6
in and cm
1 in = 2.54 cm