5 Written questions
5 Matching questions
- Define Subatomic particles, their charges, where they're found, and their relative mass.
- What are isotopes?
- What are valence electrons?
- Difference between compound and molecule?
- What are trace elements?
- a 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
- b Protons - positive; in nucleus; 1 dalton (or amu)
Neutrons - neutral; in nucleus; 1 dalton (or amu)
Electrons - negative; found outside nucleus; 0 nothing
- 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 The electrons on the outermost orbital shell
- e Elements required by organisms in minute quantities; ex: humans need iodine in small quantities or we'll get goiter
5 Multiple choice questions
- Ex: O - only 6 rings on outer shell, so it wants to gain 2, making it 2- charge
- a substance consisting of two or more different elements combined in a fixed ratio.
- Covalent bonds (STRONGEST) and Ionic bonds.
- Electron gaining or losing; e⁻ TRANSFER (NOT SHARING) between two atoms
5 True/False questions
Difference between covalent and ionic bonds? → Compound is a mixture of at least two different elements, while a molecule is a 2 or more atoms of a single element.
What is a chemical bond? → a substance consisting of two or more different elements combined in a fixed ratio.
What is electronegativity? → The number of protons in an atom.
What are our 6 Essential Elements? → CHNOPS: Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfur
Difference between an element and a compound? → Covalent bonds are the SHARING of electrons, whether it be equally or unequally
Ionic bonds are the GAINING or LOSING of electrons, NOT SHARING