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