5 Written Questions
5 Matching Questions
- Difference between compound and molecule?
- What is the atomic number?
- What's a positive ion called? A negative ion?
- What is a compound?
- What are polar covalent bonds?
- a The sharing of electrons UNEQUALLY; atoms have differing electronegativities
- b a substance consisting of two or more different elements combined in a fixed ratio.
- c Compound is a mixture of at least two different elements, while a molecule is a 2 or more atoms of a single element.
- d Positive ion = CATION
Negative ion = ANION
- e The number of protons in an atom.
5 Multiple Choice Questions
- Elements required by organisms in minute quantities; ex: humans need iodine in small quantities or we'll get goiter
- The sharing of electrons EQUALLY; atoms have similar electronegativities
- Ex: O - only 6 rings on outer shell, so it wants to gain 2, making it 2- charge
- 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
- No! Example: NH₃ (ammonia) is a hydrogen bond, the partial negative of Nitrogen bonds with the partial positive of Hydrogen.
5 True/False Questions
What are the two strong chemical bonds? → Atoms interacting with each other to share, take, or give electrons.
What are valence electrons? → The electrons on the outermost orbital shell
What are covalent bonds? Single? Double? → Two or more atoms SHARING ELECTRONS.
Single covalent bonds - sharing of one pair of valence electrons
Double - sharing of two pairs of valence electrons
What bond do two oxygen's share? → Non-polar covalent bond; they have equal electronegativity so they share their e⁻
Define Subatomic particles, their charges, where they're found, and their relative mass. → Protons - positive; in nucleus; 1 dalton (or amu)
Neutrons - neutral; in nucleus; 1 dalton (or amu)
Electrons - negative; found outside nucleus; 0 nothing