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CP Chemistry Midterm

Midterm Reviews Chapter 1-3

What is the formula for percent error? [(Experimental-actual value)/actual] x 100
What is chemistry? the study of matter and the changes it can undergo
What is the unit for mass? gram
What is the unit for volume? milliliter (mL) or liter (l)
What is the energy carried by moving objects? kinetic energy
What name a unit of energy used in the metric system? calorie
What does the Law of conservation of mass state? In any process, energy is neither created nor destroyed
Name 3 changes in state of matter melting, boiling, freezing, evaporating, condensing (etc)
What kind of changes are crushing, cutting, boiling, melting? physical chenges
What is an element? a substance that cannot be separated into simpler substances by a chemical change
What is a compound? a substance that contains two or more elements that are chemically combined in a fixed raio
Name 3 physical properties of matter. density, mass, melting point, color, texture (etc.)
What is an atom? the smallest particle of an element that retains both the physical and chemical properties of an element
Who stated that all atoms of the same element are always identical? Dalton
The mass of a neutron is equal to the mass of what other subatomic particle? proton
Which of the 3 subatomic particles has the smallest mass? electron
What is the charge of an electron? negative
What is the charge of a proton? positive
What is the charge of a neutron? neutral
Which subatomic particles are located in the nucleus? protons and neutrons
An element has an atomic number of 46. How many protons and electrons are there in a neutral atom? 46 protons and 46 electrons
What does the sum of protons and neutrons equal? mass number
How do isotopes of the same element differ? number of neutrons
When writing a nuclear symbol, what is the in upper left corner? mass number
When writing a nuclear symbol, what is the lower left corner? atomic number
The atomic number of an element is the number of what subatomic particle? proton
What is the mass number of an atom that has 15 protons and 17 neutrons? 32
What is the charge of an atom that loses two electrons? +2
What is the charge of an atom that gains 3 electrons? -3
What is the charge of an atom when protons and electrons are equal? neutral
What is the charge of an atom that gains 3 electrons? -3
Created by: ssuriano



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