Atom Structure
Negatively charged particles in an atom.
Electron
The mass number is found by adding _____ and _____
Protons and Neutrons
How elements are arranged in the periodic table.
Increasing atomic number.
Neutrons
Ions of the same element have different number of these.
Electrons
The mass of 1 mol of Carbon.
12.01 g (molar mass of C)
The smallest particle of an element that still has the properties of the element
Atom
The number of protons in an atom of an element found on the periodic table is called this.
Atomic Number
These type of elements are malleable, shiny, and conduct heat and electricity.
Metals
Naming an isotope, use the element name - this number.
Mass number
Ions have an electrical ______ that is NOT neutral.
Charge
The grams in 0.0816 moles of gold.
16.1 g Au
Structure at center of atom.
Nucleus
Average atomic mass is calculated using each isotopes mass and its what?
Abundance (as a decimal)
Elements that have properties of both metals and nonmetals.
Metalloids
In A/Z X form, the A stands for this.
Atomic mass
The charge of an ion with three less electrons than protons.
3+
The number of moles in 2.75 grams of lead.
0.0133 mol Pb
The subatomic particles that have significant mass.
Protons and Neutrons
A substance made of two or more elements chemically joined.
Compound
This class of elements is found in the last group of the periodic table and are non-reactive.
Noble gasses (full valence shell)
8 (14-6 = 8)
The charge of an atom with 17 protons and 18 electrons.
1-
Aluminum oxide is composed of 52.9% Al and 47.1% O. If 16.4 g of Al reacts completely, what mass of Oxygen did it react with?
14.6 g O
A particle in an atom that has no charge.
Neutron
If you add a proton to an atom you create this.
A new element.
The elements in the first group (column) of the periodic table create common ions with what charge?
+1
The name of the isotope with 12 protons and 10 neutrons.
Magnesium (Mg)-22
Name and charge of an atom with 8 protons and 10 electrons.
Oxygen 2-
Two samples containing C and O have 2 g of C and 2.66 g and 5.33 g of O respectively. What is the ratio of Carbon between these two samples?
Sample 1: 1
Sample 2: 2