Flashcards
F321
Flashcards do conjunto (11)
- 1Define periodicity.The trend in physical and chemical properties that are repeated throughout the periodic table.
- 2What determines the properties of a substance?Its structure and bonding type
- 3What is the charge and mass of a proton? Where is it found?+1
1
The nucleus - 4What is the charge and mass of a neutron? Where are they found?0
1
The nucleus - 5What is the charge and mass of an electron? Where are they found?-1
1/2000th of the mass of a proton
The electron shells - 6Explain the charge on an atom?There is no charge on an atom, because there are equal numbers of protons and electrons.
- 7Define the term isotope.Atoms of the same element with different numbers of neutrons and therefore different mass numbers.
- 8What is used as a standard measurement of relative mass?The mass of Carbon-12.
- 9Define relative isotopic massThe mass of an atom of an isotope compared to the mass of 1/12 of the mass of an atom in carbon-12
- 10Define relative atomic mass.The weighted mean mass of an atom of an element, relative to 1/12 of the mass of an atom of Carbon-12.
- 11How do you calculate the relative atomic mass of an element, given the relative abundances of its isotope?Atomic Mass =
[(mass of isotope) (%abundance) ] + [(mass of isotope) (%abundance)]
*100%