Periodic-ally Speaking
The vertical columns on the periodic table are called these.
What are groups or families?
Atomic radius generally increases in this direction on the periodic table.
What is down and to the left?
An atom has an atomic number of 12. This is the number of protons it contains.
What is 12 protons?
Construct the Bohr model and Lewis dot structure for a neutral sodium atom, Na.
Bohr model: 2–8–1; Lewis structure: Na with 1 valence electrons.
This is the number of atoms in one mole of any element.
What is 6.022 x 1023 atoms?
The horizontal rows on the periodic table are called these.
What are periods?
Arrange these elements in order of increasing atomic radius: Na, Mg, Al, Si.
What is Si < Al < Mg < Na?
This isotope of potassium, K-39, contains this many neutrons.
What is 20 neutrons?
Construct the Bohr model and Lewis dot structure for a neutral magnesium atom, Mg.
Bohr model: 2–8–2; Lewis structure: Mg with 2 valence electrons.
This is the number of moles in 27.0 g of aluminum, Al.
What is 1.00 mol Al?
These elements are located on the left side of the periodic table and are usually shiny and conductive.
What are metals?
Arrange these elements in order of increasing ionization energy: Na, Mg, Si, Cl.
What is Na < Mg < Si < Cl?
A magnesium ion has an atomic number of 12 and a 2+ charge. This is the number of electrons it contains.
What are 10 electrons?
Construct the Bohr model and Lewis dot structure for an oxygen ion O2-.
Bohr model: 2–8; Lewis structure: [O2-] with 8 dots.
This is the mass of 3.00 mol of iron, Fe
What is 168 g Fe?
These elements are found along the staircase and have properties of both metals and nonmetals.
What are metalloids?
Arrange these elements in order of decreasing electronegativity: K, Ca, S, Cl.
What is Cl > S > Ca > K?
An aluminum ion is written as, aluminum-27+3. Identify its numbers of protons, neutrons, and electrons.
What are 13 protons, 14 neutrons, and 10 electrons?
Chlorine-37 is neutral. Construct its Bohr model and Lewis dot structure.
Bohr model: 2–8–7, with 17 protons and 20 neutrons; Lewis structure: Cl with 7 valence electrons.
This is the number of moles represented by 3.01 x 1023 atoms of copper, Cu.
What is 0.500 mol Cu?
This family contains elements that are very unreactive because their outer energy level is full.
What are the noble gases?
Arrange these elements in order of increasing atomic radius: Br, Ga, Ca, K.
What is Br < Ga < Ca < K?
An atom contains 17 protons, 18 neutrons, and 18 electrons. Identify the element, mass number, and charge.
What are chlorine, a mass number of 35, and a -1/1- charge?
Construct the Bohr model and Lewis dot structure for an aluminum ion, Al3+
Bohr model: 2–8, with 13 protons and 10 electrons; Lewis structure: [Al3+] with no dots or a complete outer shell shown as an ion.
This is the number of atoms in 11.5 g of sodium, Na.
What is 3.01 x 1023 atoms Na?