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50 Cards in this Set
- Front
- Back
Group 7A elements are also called
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halogens
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Equal sharing of electrons is called
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covalent bonding
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What contains the same atoms, but has a different atomic mass?
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ion
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What is a diatomic molecule
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a molecule that contains two atoms such as hydrogen, oxygen, helium, nitrogen, phosphorus, sulphur
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Chemical changes differ from physical changes in that chemical changes end in
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new kinds of matter with different properties
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heterogeneous means
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a mixture in which the parts are still visible from other parts
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The smallest unit of a element that can exist either alone or in combination is
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the atom
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A basic unit of length in the metric system is
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meter
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A distance of 1.5 m is equal to ___ cm
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150 cm
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One pound equals how many grams
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454 grams
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The number of significant digits in 0.04060 are
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4
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Formula representing the whole number multiple of atoms is called
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molecular formula
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A quart is equal to
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946 ml
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The mass l.42 kg is ___ g
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1420 g
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The transition elements are all
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metals
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A positive charged ion is called a
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cation
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a negatively charged ion is called a
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anion
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The capacity to do work is
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energy
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A compound consists of
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two or more elements
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One inch is equal to ? cm
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an inch is 2.57 cm
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What is the formula for density?
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Density equals mass divided by volume
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The most active metals are those found in
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Group 1A
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Mass per unit volume is
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density
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This person arranged the periodic table according to the number of atoms
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Henry Moseley
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Those elements that are octets are
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those with 8 electrons in their outer ring such as all noble gases except helium and hydrogen
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The most active member of the halogen family is
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Fluorine
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The number 3,200,000 correctly written using scientific notation is
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3.2 x 10 (6)
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The correct set to determine the number of kg is 587 g is
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0.587 kg
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Homogeneous
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a mixture in which the components are uniformly mixed and cannot be visually distinquished from other parts
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Unequal sharing or contribution of electrons is called
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ionic bonding
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What are the parts of the scientific method?
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Observations
Problem Hypothesis Procedure (Experiment) Data collection Results Conclusion |
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3.6 x 10 (-5) is what in scientific notation?
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0.000036
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The number of significant digits represented by 9, 000 is ?
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one
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Who discovered neon, krypton, zenon and argon?
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Sir William Ramsey
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The number of significant digits in the measurement of 3.04 cm is
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3
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Mass per unit volume is written
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grams per centimeters cubed
g/cm3 |
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A resistance to change or motion is
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inertia
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This matter has definite volume, but no definite shape
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liquid
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The energy of position is
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potential energy
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This matter has no definite volume or shape
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gas
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The formula for finding mass is
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M = DV or mass equals density times volume
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The energy of motion is
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kinetic energy
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Any process that absorbs energy as it processes is called
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endothermic
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Any process that gives off energy as it progresses is
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exothermic
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The number of protons in the nucleus of an atom also represents the number of
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electrons
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The number of protons and neutrons of an atom represent the atom's
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atomic number
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Who proposed the atomic theory
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Avogadro
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A homogenous material consisting of one particular kind of matter is?
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element
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What are the characteristics of metals?
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All metals (except mercury) are solid at room temperature
Metals are crystalline with atoms arranged in regular patterns Metals tend to give up electrons |
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Substance that can not be broken down by ordinary means are classified as:
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elements
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