5 Written questions
5 Matching questions
- What are ionic bonds?
- Difference between covalent and ionic bonds?
- What are the two strong chemical bonds?
- What are covalent bonds? Single? Double?
- What is a compound?
- a Covalent bonds are the SHARING of electrons, whether it be equally or unequally
Ionic bonds are the GAINING or LOSING of electrons, NOT SHARING
- b Two or more atoms SHARING ELECTRONS.
Single covalent bonds - sharing of one pair of valence electrons
Double - sharing of two pairs of valence electrons
- c Covalent bonds (STRONGEST) and Ionic bonds.
- d a substance consisting of two or more different elements combined in a fixed ratio.
- e Electron gaining or losing; e⁻ TRANSFER (NOT SHARING) between two atoms
5 Multiple choice questions
- The making and breaking of chemical bonds.
1. Reactants - structure of chemicals prior to a chemical reaction
3. Products - structure of chemicals as a result of a chemical reaction
- Compound is a mixture of at least two different elements, while a molecule is a 2 or more atoms of a single element.
- Protons - positive; in nucleus; 1 dalton (or amu)
Neutrons - neutral; in nucleus; 1 dalton (or amu)
Electrons - negative; found outside nucleus; 0 nothing
- A compound has characteristics different from those of its elements. Table salt, for example, is sodium chloride (NaCl), a compound composed of the elements sodium (Na) and chlorine (Cl) in a 1:1 ratio. Pure sodium is a metal, and pure chlorine is a poisonous gas. When chemically combined, however, sodium and chlorine form an edible compound.
- Polar covalent bond.
(it's when there's more than one polar molecule that hydrogen bonding takes place)
5 True/False questions
What is the atomic mass? → The number of protons in an atom.
What's a positive ion called? A negative ion? → One atom's attraction of the electrons within one covalently bonded molecule
O > N > C > H
Oxygen - most electronegative element
What is a chemical bond? → 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
What are isotopes? → 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