Chemistry 11th Grade, Chapter 1 Exam
with Verified Detailed Answers
matter -
correct answer ✅anything that has mass and takes up space
proton -
correct answer ✅a positively charged particle in the atom's
nucleus
neutron -
correct answer ✅a neutral particle in an atom's nucleus
energy level -
correct answer ✅a theoretical sphere around an atom where
electron exists; electron orbit
valence shell -
correct answer ✅the outermost energy level or orbit of an atom
or ion
valence electron -
correct answer ✅an electron in the outermost energy level or
orbit
, Chemistry 11th Grade, Chapter 1 Exam
with Verified Detailed Answers
atomic number -
correct answer ✅the unique number of protons in one atom of an
element
mass number -
correct answer ✅the sum of the protons and neutrons in the
nucleus of an atom
atomic mass unit -
correct answer ✅a very small unit of mass defined as 1/12 the
mass of a carbon-12 atom; unit symbol u
full or stable octet -
correct answer ✅an electron arrangement where the valence shell
is filled with 8 valence electrons (2 for hydrogen and helium)
octet rule -
correct answer ✅a generalization stating that when atoms
combine, they tend to achieve 8 valence electrons
with Verified Detailed Answers
matter -
correct answer ✅anything that has mass and takes up space
proton -
correct answer ✅a positively charged particle in the atom's
nucleus
neutron -
correct answer ✅a neutral particle in an atom's nucleus
energy level -
correct answer ✅a theoretical sphere around an atom where
electron exists; electron orbit
valence shell -
correct answer ✅the outermost energy level or orbit of an atom
or ion
valence electron -
correct answer ✅an electron in the outermost energy level or
orbit
, Chemistry 11th Grade, Chapter 1 Exam
with Verified Detailed Answers
atomic number -
correct answer ✅the unique number of protons in one atom of an
element
mass number -
correct answer ✅the sum of the protons and neutrons in the
nucleus of an atom
atomic mass unit -
correct answer ✅a very small unit of mass defined as 1/12 the
mass of a carbon-12 atom; unit symbol u
full or stable octet -
correct answer ✅an electron arrangement where the valence shell
is filled with 8 valence electrons (2 for hydrogen and helium)
octet rule -
correct answer ✅a generalization stating that when atoms
combine, they tend to achieve 8 valence electrons
