Electrons
The number of valence electrons in an aluminum atom.
What is three
Avogadro's number
What is 6.02 x 1023
The element in row three with two valence electrons.
What is magnesium.
A chemistry teacher picked up 12 pencils, 15 pens, 18 gum wrappers, and 45 unfinished worksheets on the floor.
What percent of these items were unfinished worksheets?
What is 50%.
The group of elements that exist as individual atoms (These elements are non-reactive)
What are noble gasses.
A noble gas with two core electrons
What is neon
The number of magnesium atoms in 24.3 grams of magnesium.
What is 6.02 x 1023
This row three element has a 2- charge when it acquires a full octet.
What is Sulfur.
The number of silver (Ag) atoms in a 5.75 grams sample of pure silver.
What is 3.21 x 1022 silver atoms.
b-block elements: _____________ metals.
What is transition metals.
The element in row two with four valence electrons.
What is carbon.
The mass, in grams, of 3.01 x 1023 atoms of hydrogen.
What is 0.5 grams
This row 3 element is a metalloid.
What is silicon.
A 1.25 kg sample of air was found to contain 975 grams of nitrogen. What is the percent of nitrogen in this sample?
What is 78%.
The number of neutrons in Sr-88.
What is 50.
The total number of electrons in Ca2+
What is 18.
The mass of 1.25 moles of titanium metal.
What is 59.9 grams.
This row three element typically exists only as an individual atom.
What is argon.
Calculate the mass of 5.15 x 1022 atoms of nickel (Ni).
Hint: The molar mass of nickel is 59 grams / mol.
What is 5.05 grams of nickel.
When an ion, this element can be thought of as a proton.
What is hydrogen.
In the formation of an ionic bond, electrons are transferred from the _____________ to the ____________.
What is from the cation (metal) to the anion (nonmetal).
The mass of 4.67 x 1024 molecules of chlorine (Cl2) gas.
What is 551 grams.
These two row three elements combine to form common table salt.
What are Na (sodium) and Cl (chlorine).
The number of gold atoms in a 10 gram sample of gold with a purity of 62%.
What is 1.89 x 1022 gold atoms
Canton Prep #1.
What is 2nd to none.