Atoms & Ions
The is the number of valence electrons in a magnesium atom.
What is 2?
Draw the formation and final diagram for a sodium chloride compound.
What is Na with no dots and a + charge, and Cl with 8 dots and a - charge?
What is N2O5?
Ionic compounds are made of these two types of elements.
What are metals and non-metals?
Identify the polyatomic ion in the formula NaNO3.
What is nitrate (NO3-)?
Identify the number of electrons in an oxide ion (O2-).
What is 10 electrons
Draw the formation and final diagram for a molecule of chlorine.
What is Cl-Cl with 3 lone pairs on each Cl atom?
Write the formula for ammonium sulfate.
What is (NH4)2SO4?
The type of compound that forms a crystalline solid.
What is an ionic compound?
What are covalent bonds?
A neutral atom has 15 protons and 16 neutrons. Predict the element and its symbol.
What is phosphorus (P)?
Draw the formation and final diagram for aluminum bromide.
What is Al with no dots and a 3+ charge, and 3 Br with 8 dots and a - charge (arranged properly)?
The name for the compound NCl3 is nitrogen chloride.
True/False (explain if False).
What is false?
This is a molecular compound so the name should contain prefixes. The correct name is nitrogen trichloride.
Will K2SO4 conduct electricity?
What is yes?
Predict the total number of oxygen atoms in Al2(SO4)3.
What is 12?
Identify the atom that could form -3 ion and is located in Period 2 of the periodic table.
Draw the formation and final Lewis dot diagram for a molecule of carbon dioxide.
- Draws O=C=O, with 2 lone pairs on each O atom?
A compound has the formula XSO₄. List ALL the possible identities of X.
What is magnesium, calcium, strontium or barium
A solid compound dissolves in water and conducts electricity. Predict whether the compound is ionic or molecular.
What is ionic?
A compound is formed from aluminum ions and hydroxide ions. Predict the chemical formula.
A compound contains an ion with 17 protons and 18 electrons. Predict the ion and its charge.
What is chloride (Cl-)?
Draw the formation and final diagram of the compound CH3CH3 (NOT TESTED)
Carbons are bonded together with 3 hydrogens surrounding each carbon atom.
An ionic compound has the formula Al2X3, where X is a non-metal in period 3. Predict the identity of X.
What is sulfur?
Compound B has a melting point of -77.7 degrees celcius
Identify each compound above as either NaCl or NH4.
What is A - NaCl and B- NH4
Is the chemical formula Al2O3 correct?
Use the zero sum rule OR draw a Lewis dot diagram to confirm your answer.
What is no?
- proves answer correctly