Calcium phosphide is a compound used in fireworks. Show the formula of this compound using the CRISSCROSS method of the ions formed between calcium and phosphate.
Which rule states that atoms tend to bond until they have eight (8) valence electrons?
Octet Rule
True or False. Non-metals have the tendency to LOSE electrons.
FALSE
TRUE or FALSE. Hydrogen atom has ONE (1) valence electrons and is considered a METAL.
FALSE. Hydrogen is a NON-METAL.
Draw the LEDS for Silicon (Si).
What ion will be formed from oxygen if it GAINS electron to be stable? (Make sure to include the charge)
O²⁻
Caesium iodide is often used in x-ray image intensifier tube. What is its CHEMICAL FORMULA? (Wrong capitalization of letters will be incorrect).
CsI
What ion will be formed from potassium (K) if it LOSES electron to be stable? (Make sure to include the charge)
K⁺
What is the correct chemical formula for calcium nitride?
Ca₃N₂
Draw the LEDS of Chlorine (Cl)
How may valence electrons are there in Nitrogen (N) atom?
Five (5)
Sulfates are usually found in shampoos. What is the chemical formula of this polyatomic ion? (Make sure to include the charge)
SO₄²⁻
What do you call an ion with a net POSITIVE charge?
cation
Calcium carbonate is the compound that makes up most of the seashells. What is the chemical formula for it? (Wrong capitalization of letters will be incorrect).
CaCO₃
Name ONE atom that tends to be stable with only TWO electrons in the first energy level.
Hyrdogen (H) or Helium (He) or Lithium or (Li) or Berrylium (Be)
What is the NAME of this ionic compound: CaBr₂
Calcium Bromide
What is the correct chemical formula for sodium iodide?
NaI
Name ONE example of a METAL.
Correct answers include all the highlighted atoms in the image.
Draw the transfer of electrons between Mg and O using LEDS. Include the FINAL LEDS.
Calcium phosphate provides the hardness and strength of bones. What is its CHEMICAL FORMULA?
Ca₃(PO₄)₂
What is the NAME of this ionic compound: KCl
Potassium Chloride
Give one property of an ionic compound.
Can conduct electricity in aqueous solution, has high melting or boiling points
Lithium oxide is a compound used for making ceramics and glass. What is the chemical FORMULA of this compound?
Li₂O
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