Integrated Physical Sciences - Section 2 Test
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22 Terms
Which subatomic particle is located outside the nucleus?
electrons
Which subatomic particle has approximately the same mass as the proton?
the neutron
What is shared or transferred when a chemical bond is formed?
Valence electrons
How is a compound formed?
Electrons are transferred or shared between atoms.
Which of the following is an element?
Copper (Cu)
2 multiple choice options
A liquid of unknown composition is heated. The liquid evaporates, and a white powder is left behind. Was the unknown substance a pure substance or a mixture?
Mixture
In what state is matter compressible?
gas
In what state is the motion of particles lowest?
solid
Why do liquids pour?
Because particles of matter slide past one another in the liquid state.
Sugar forms a mixture with water. Is this a chemical change or a physical change?
a physical change
Which type of change occurs when water evaporates off a sidewalk?
a physical change
Review the following equation.
H2O + CO2 → H2CO3
Is this change a physical change or a chemical change?
a chemical change
How could a zinc ion with a charge of plus two (Zn+2) be converted to an electrically neutral zinc atom?
By the addition of two electrons
Which type of chemical bond is formed when valence electrons are transferred from one atom to another?
ionic bond
Silver ions (Ag+) and chloride ions (Cl-) react to form silver chloride (AgCl):
Ag+(aq) + Cl-(aq) → AgCl
Which type of bond holds the silver and chloride ions together in silver chloride?
ionic bond
Which type of chemical bond holds two atoms together in a molecule?
covalent bond
Which type of element tends to lose electrons?
metal
What type of bond forms when two non-metal atoms share their valence electrons?
covalent
What may change during a physical change?
the spacing between atoms or molecules
Hydrogen (H2) and chlorine (Cl2) can react to form hydrochloric acid according to the following balanced chemical equation:
H2 + Cl2 → 2HCl
2 g + 70 g = ?
If 2 g of H2 and 70 g of Cl2 molecules react, what will the total mass of the products be?
72 g
Is heat absorbed or released when a gas condenses?
Heat is released when a gas condenses.
Why does steam burn skin?
Water vapor releases heat as it condenses on the skin, which damages the tissue.