Electrons and Ions
Identify the number of valence electrons for the element with electron configuration
1s2 2s2 2p6 3s2 3p4
6
Name the bond type formed between sodium and chlorine.
ionic
Write the formula for a compound made from calcium and nitrate ions.
Ca(NO₃)₂
This law states that mass is conserved in chemical reactions.
Law of Conservation of Mass
Predict the products of the reaction:
Fe2O3 + C -->
Fe2O3 + C --> CO2 + Fe
Predict the ionic charge formed by an atom with electron configuration [Ne] 3s1
+1
Ionic or Covalent: Which type of compounds have higher melting points?
ionic
Write the formula for dinitrogen tetroxide.
N₂O₄
Balance this: ___H₂ + ___O₂ → ___H₂O
__2_H₂ + ___O₂ → __2_H₂O
A reaction where two substances combine to form one product.
synthesis
Which group of elements can Mg most likely bond with?
group 6
Is H2O ionic or covalent
covalent
Write the chemical formula for magnesium chloride.
MgCl2
Does this chemical reaction follow the law of conservation:
CaSO4 + Mg(OH)2 → Ca(OH)2 + MgSO4
yes
Zn + CuSO₄ → ZnSO₄ + Cu is this type of reaction.
single replacement
What happens to the valence electrons for potassium when it bonds with chlorine?
potassium transfers (loses) its 1 valence electron
Identify the ion aluminum forms in aluminum sulfate.
Al+3
Write the formula for the ionic compound formed from calcium and sulfur?
CaS
Transform the word equation "magnesium + oxygen → magnesium oxide" into a balanced chemical equation.
2Mg + O2 --> 2MgO
This reaction always involves oxygen and produces CO₂ and H₂O.
combustion
Draw the lewis dot structure for Oxygen.
6 dots around O
What is the ionic charge of Chlorine in NaCl?
Cl-1
Write the name for Fe₂O₃.
iron(III) oxide
What is the coefficient in front of Oxygen to balance the equation?:
__Al + __O₂ → __Al₂O₃
_4_Al + _3_O₂ → _2_Al₂O₃
Predict the products:
2K + Cl₂ → ?
2K + Cl₂ → 2KCl