Chapter 4: Chemical Foundations (Elements, Atoms, and Ions) Flashcards
1
Q
noble metals
A
a class of metals that are relatively unreactive
- gold
- silver
- platinum
2
Q
noble gases
A
elements that appear in nature in the uncombined state
Group 8:
- helium
- neon
- argon
- krypton
- xenon
- radon
3
Q
diatomic molecules
A
molecules made up of two atoms
- hydrogen gas (H2)
- oxygen gas (O2)
- nitrogen gas (N2)
- chlorine gas (Cl2)
4
Q
Elements That Exist as Diatomic Molecules in Their Elemental Forms
A
5
Q
Elemental State of Diatomic Molecules at 25ºC
A
6
Q
allotropes
A
different forms of a given element
7
Q
ions
A
a charged entity produced by adding or removing one or more electrons to a neutral atom
8
Q
cation
A
a positive ion (produced when one or more electrons are lost from a neutral atom)
