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WorksheetsHomework: Elements, Compounds, Mixtures, & Chemical Bonds
Total questions: 10
Worksheet time: 6mins
Rust, Fe2O3, is composed of which elements?
fluorine and oxygen
iron and oxygen
francium and oxygen
iron and oganesson
Rust, Fe2O3, is bonded by which chemical bond?
covalent
ionic
metallic
protons
Which of the following represents a pure substance consisting of a single type of atom?
CO2 (carbon dioxide)
C6H12O6 (glucose)
Na (sodium)
NaCl (salt)
Which compounds are bound by covalent bonds?
[Click ALL that apply.]
CO2 (carbon dioxide)
Fe2O3 (rust)
NaCl (salt)
H2O (water)
Which of the following represents a pure substance consisting of 2 or more atoms that are chemically combined?
C (carbon)
C6H12O6 (glucose)
Na (sodium)
Cl (chlorine)
Which of the following is NOT true about ionic bonds?
Has low melting and boiling points
Creates ions (charged particle)
Formed between atoms of metals and nonmetals
Always exothermic
TRUE or FALSE: For the octet rule, an atom is most stable when there are 7 electrons in its outermost orbital.
TRUE
FALSE
Electrons in the outermost orbital are called (a) electrons.
Bonds form because atoms are seeking (a) .
Chocolate milk represents which of the following?
element
compound
heterogeneous mixture
homogeneous mixture
