30 points plss ! - match the term and defintion 1. acid a) used to measure the ph of substances by determining their hydrogen ion concentration 2. base b) a compound that increases hydroxide ions (oh−) when it is dissolved in a solution 3. ph c) a value from 0 to 14 that is used to specify how acidic or basic a compound is when it is dissolved in water 4. litmus paper d) a compound that increases hydrogen ions (h+) when it is dissolved in a solution

if two electrons have the same n, the same ℓ, and the same ml, then they are in the same orbital. the pauli exclusion principle states that no two identical fermions (a fancy word for electrons and other subatomic particles like electrons) may occupy the same quantum state in an atom simultaneously.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

fe 55.85 g/mol and h2o 18.02 g/mol.