Question

Some questions for science that I’ve answered but I’m not too sure on.

1) Boron is to the immediate left of carbon in the same row in the periodic table. which of the following statements compares the radius and pull exerted by the protons of boron and carbon atoms?
A. Boron has a smaller radius and the protons in carbon exert a greater pull.
B. Boron has a larger radius and the protons in carbon exert a greater pull.
C. Boron has a smaller radius and the protons in carbon exert less pull.
D. Boron has a larger radius and the protons in carbon exert less pull.

2) Which statement is true about HCI?
A. It is a salt because it increases the concentration of metallic ions.
B. It is a salt because it is formed by the reaction of an acid and a base.
C. It is an acid because it increases the concentration of hydroxyl ions.
D. It is an acid because it increases the concentration of hydronium ions.

3)Which statement is true about sand and baking soda?
A. Both are mixtures.
B. Both are pure substances.
C. Sand is a mixture and baking soda is a pure substance.
D. Sand is a pure substance and baking soda is a mixture.

4) Which statement is true about elements?
A. They are finite in number.
B. They are infinite in number.
C. They combine to form atoms.
D. They combine to form electrons.

Thank you I just got confused.

Answer 1

Boron has a smaller radius so B.

Answer 2

a, d, c, c. for the first one i would say a because Boron has a smaller radius.