Chapter 2 - Atoms, ions and compounds Flashcards
What is the definition of ‘relative isotopic mass’?
The mass of an isotope relative to 1/12th of the mass of an atom of carbon-12.
What is the definition of ‘relative atomic mass’?
The weighted mean mass of an atom of an element relative to 1/12th of the mass of an atom of carbon-12.
What is the equation for relative atomic mass?
(% abundance x isotopic mass) + (%abundance x isotopic mass) all over 100.
What is the definition of ‘relative molecular mass’?
Compares the mass of a molecule with the mass of an atom of carbon-12.
What is the definition of ‘relative formula mass’?
Compares the mass of a formula unit with the mass of an atom of carbon-12.
What are isotopes?
Atoms of the same element with different numbers of neutrons and different masses.
What ions do elements on the left side of the periodic table form?
Cations
What ions do elements on the right side of the period table form?
Anions
What charge ions do silver and zinc form?
1+ and 2+
What charge ions do group 1,2 and 3 form?
1+, 2+, and 3+
What charge ions do group 5,6 and 7 form?
3-, 2- and 1-
What is the definition of a binary compound?
A compound containing only two elements.
How do you name a binary compound?
Use the name of the first element and add the second element with the ending ‘ide’.
What is the definition of a polyatomic ion?
An ion containing more than one element bonded together.
Name one polyatomic ion with a 1+ charge.
NH4 (ammonium)
