Question

1. identify write the chemical symbol for each of the following elements: a. lead b. oxygen c. silver d. sodium e. hydrogen f. aluminum 29. identify name the chemical elements represented by the following symbols: a. c b. ca c. k d. au e. fe f. cu 30. identify what elements make up the pain reliever acetaminophen, chemical formula c₈h₉o₂n? which element is present in the greatest proportion by number of particles? 31. identify name two elements that have properties similar to those of the element calcium (ca).

Explanation:

Step1: Recall chemical symbols for 28

a. Lead's symbol is Pb.
b. Oxygen's symbol is O.
c. Silver's symbol is Ag.
d. Sodium's symbol is Na.
e. Hydrogen's symbol is H.
f. Aluminum's symbol is Al.

Step2: Recall element names for 29

a. C represents carbon.
b. Ca represents calcium.
c. K represents potassium.
d. Au represents gold.
e. Fe represents iron.
f. Cu represents copper.

Step3: Analyze elements in acetaminophen for 30

The elements in $C_{8}H_{9}O_{2}N$ are carbon (C), hydrogen (H), oxygen (O), and nitrogen (N). The element with the greatest number of particles is hydrogen with 9 atoms.

Step4: Find similar - elements to calcium for 31

Elements in the same group of the periodic table have similar properties. Calcium is in Group 2 (alkaline - earth metals). Magnesium (Mg) and strontium (Sr) are also in Group 2 and have properties similar to calcium.

Answer:

28.
a. Pb
b. O
c. Ag
d. Na
e. H
f. Al
29.
a. Carbon
b. Calcium
c. Potassium
d. Gold
e. Iron
f. Copper

1. Elements: carbon, hydrogen, oxygen, nitrogen. Element with greatest proportion by number of particles: hydrogen.
2. Magnesium, strontium