Download Chapter 10

Chapter 10
1. Atom – the smallest unit of an element that maintains the properties of
that element
2. Nucleus – in physical science, an atom’s central region, which is made
up of protons and neutrons
3. Proton – a subatomic particle that has a positive charge and that is
located in the nucleus of an atom
4. Neutron – a subatomic particle that has no charge and that is found in
the nucleus of an atom
5. Electron – a subatomic particle that has a negative charge
6. Electron cloud – a region around the nucleus of an atom where
electrons are likely to be found
7. Isotope – an atom that has the same number of protons but has a
different number of neutrons
8. Atomic number – the number of protons in the nucleus of an atom
9. Atomic mass – the sum of the numbers of protons and neutrons in the
nucleus of an atom
Chapter 11
1. Periodic-describes something that occurs or repeats at regular
intervals
2. Period-a horizontal row of elements in the periodic table
3. Group- a vertical column of elements in the periodic table; elements in
a group share chemical properties
4. Metal-an element that is shiny and that conducts heat and electricity
well
5. Nonmetal-an element that conducts heat and electricity
poorly
6. Metalloid-elements that have properties of both metals and nonmetals
7. Alkali metal-one of the elements of Group 1 of the periodic table
(lithium, sodium, potassium, rubidium, cesium, and francium)
8. Alkaline-earth metal-one of the elements of Group 2 of the
periodic table (beryllium, magnesium, calcium, strontium, barium, and
radium)
9. Halogen-one of the elements of Group 17 of the periodic
table (fluorine, chlorine, bromine, iodine, and statine); halogens combine
with most metals to form salts
10. Noble gas- one of the elements of Group 18 of the periodic table
(helium, neon, argon, krypton, xenon, and radon); noble gases are
unreactive
Chapter 10
1. Atom – the smallest unit of an element that maintains the properties of
that element
2. Nucleus – in physical science, an atom’s central region, which is made
up of protons and neutrons
3. Proton – a subatomic particle that has a positive charge and that is
located in the nucleus of an atom
4. Neutron – a subatomic particle that has no charge and that is found in
the nucleus of an atom
5. Electron – a subatomic particle that has a negative charge
6. Electron cloud – a region around the nucleus of an atom where
electrons are likely to be found
7. Isotope – an atom that has the same number of protons but has a
different number of neutrons
8. Atomic number – the number of protons in the nucleus of an atom
9. Atomic mass – the sum of the numbers of protons and neutrons in the
nucleus of an atom
Chapter 11
1. Periodic-describes something that occurs or repeats at regular
intervals
2. Period-a horizontal row of elements in the periodic table
3. Group- a vertical column of elements in the periodic table; elements in
a group share chemical properties
4. Metal-an element that is shiny and that conducts heat and electricity
well
5. Nonmetal-an element that conducts heat and electricity
poorly
6. Metalloid-elements that have properties of both metals and nonmetals
7. Alkali metal-one of the elements of Group 1 of the periodic table
(lithium, sodium, potassium, rubidium, cesium, and francium)
8. Alkaline-earth metal-one of the elements of Group 2 of the
periodic table (beryllium, magnesium, calcium, strontium, barium, and
radium)
9. Halogen-one of the elements of Group 17 of the periodic
table (fluorine, chlorine, bromine, iodine, and statine); halogens combine
with most metals to form salts
10. Noble gas- one of the elements of Group 18 of the periodic table
(helium, neon, argon, krypton, xenon, and radon); noble gases are
unreactive