Unit 1
How many sig figs does 45,002 have?
In what direction does atomic radius increase on the periodic table?
down and left
What is required to find the energy of a photon?
frequency and Planck's constant
In what type of bond are electrons shared?
Covalent
What is Avogadro's number?
6.022 x 10^23
What is the density of an object with a mass of 6 grams and a volume of 3 mL? Include units!
2 g/mL
Why does atomic radius increase going down the periodic table?
There are more rings as you go down rows
What element has the following electron configuration when neutral: 1s2
Helium
What type of bond will magnesium and carbon form?
Ionic
What is the empirical formula of this molecule: C6H12O6
CH2O
How many sig figs does 0.00450 have?
3
What is electronegativity?
Pull of shared electrons within a covalent bond
What is the maximum number of electrons an f orbital can hold?
14
Name this molecule: CaF2
Calcium fluoride
What is the empirical formula of C5H12N2
C5H12N2
What are four signs of a chemical reaction?
unexpected color change, heat production, gas production, precipitate formed, odor production
Order the following elements by increasing atomic radius: Rb, Na, Fr, Li, Cs
Li, Na, Rb, Cs, Fr
What element has the following electron configuration when neutral: [Ne] 3s2 3p1
Aluminum
What is the formula for diphosphorus triiodide?
P2I3
When converting from grams to moles what conversion factor should you use?
molar mass
What is the mass of an object with a volume of 6 mL and a density of 4 mL? Include units!
24 grams
Order the following elements by increasing electronegativity: F, Fr, B, O, Be
Fr, Be, B, O, F
Name an element that is an exception to the octet rule
Hydrogen, Helium, Lithium, Beryllium, Boron
What is the formula for lead (IV) oxide?
Pb2O
When converting from grams to atoms what conversion factors should you use?
molar mass and Avogadro's number