Types of Matter
define molecule
Two or more atoms bonded together covalently
Bohr diagrams show a electrons organized in _____________
shells
a pH below 7 means a chemical is?
acidic
write the chemical name for CO
Carbon monoxide
what are the 6 types of chemical reactions we learned about?
synthesis, decomposition, single replacement, double replacement, neutralization, combustion
how many non-metal elements are there?
17
what is a lone pair?
pair of valence electrons not shared with another atom
A reaction which produces CO₂ and H₂O is a _____________ reaction
combustion
write the chemical formula for hydrofluoric acid
HF (aq)
what is the chemical formula for zirconium oxide
ZrO₂
What is a diatomic element and list all 7
diatomic particles are elements that exist as molecules (2 atoms chemically bonded together). Not found as a single atom in their pure elemental form.
hydrogen, nitrogen, oxygen , fluorine , chlorine , bromine , and iodine
Draw the lewis diagram for Silicon
four electrons
generally, acids taste ________ and bases taste___________
sour, bitter
name the following compound: SF₆
Sulphur hexafluoride
predict the products: HF + KOH and state the type of reaction
neutralization, KF+H₂O
classify NH₄Cl as ionic or covalent
Ionic
Draw the Bohr diagram for a Na+
10 electrons, 2, 8, plus outside brackets
predict the product BaCl₂ + ___ Na₂SO₄ ->
BaSO₄ + NaCl
Give the chemical formula for Potassium dichromate
K₂Cr₂O₇
balance the following equation __ Li + __ H₂O → __ LiOH + ___ H₂
2Li + 2 H₂O → 2 LiOH + H₂
Classify NaOH as a molecule, element or compound. Then identify the chemical name and classify it as covalent or ionic
compound
Sodium hydroxide
Ionic
what atom has 3 energy shells with 2 electrons on the outer most shell?
Mg
name the chemical HCl(aq) and what it was used for in our last lab?
Hydrochloric acid. This was used to determine if the precipitate is carbonate or chloride.
write the chemical name for Cr(NO₃)₃
Chromium (III) nitrate
predict products for the following reaction C₈H₁₈ + O₂ , classify the type of reaction, and balance.
2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O, combustion