5 Written questions
5 Matching questions
- What is an ion?
- What is the atomic number?
- What is an element?
- What is a hydrogen bond? Strong or weak?
- What is the atomic mass?
- a A substance that cannot be broken down to other substances by chemical reactions.
- b Partial plus of a Hydrogen in a polar molecule forms a bond with a Partial Minus of another polar molecule; Weak bond.
- c Atoms that lose or gain electrons to complete their outer shell
- d The number of protons in an atom.
- e The number of protons and neutrons in nucleus.
5 Multiple choice questions
- Elements required by organisms in minute quantities; ex: humans need iodine in small quantities or we'll get goiter
- One atom's attraction of the electrons within one covalently bonded molecule
O > N > C > H
Oxygen - most electronegative element
- The sharing of electrons UNEQUALLY; atoms have differing electronegativities
- Different forms of the same element; they differ in number of neutrons, but they have the same # of protons and behave identically in chemical reactions
- The sharing of electrons EQUALLY; atoms have similar electronegativities
5 True/False questions
Are Van der Waals interactions weak or strong? → Weak.
What bond do two oxygen's share? → Non-polar covalent bond; they have equal electronegativity so they share their e⁻
What is a compound? → a substance consisting of two or more different elements combined in a fixed ratio.
What are our 6 Essential Elements? → CHNOPS: Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfur
Difference between compound and molecule? → Compound is a mixture of at least two different elements, while a molecule is a 2 or more atoms of a single element.