Hydrogen is in group 1a of the periodic table, known as the alkali metals, although it obviously isn't a metal. what is the reason for its placement in this group?
a) hydrogen has the same electron configuration as alkali metals.
b) hydrogen is a metal, but has an extremely low vaporization point.
c) there isn't room for hydrogen on the right side of the table with other nonmetals.
d) scientists didn't want to reconfigure the periodic table after they discovered that hydrogen wasn't a metal.

nec chapter 5 contains

c. information on special occupancy areas

nec chapter 6 covers

a. special equipment

which of the following rules contain the words shall or shall not and must be adhered to?

b. mandatory rules

which of the following rules identify actions that are allowed but not required and typically cover options or alternative methods?

c. optional rules

which of the following serves as the introduction to the nec and provides an overview of the book?

a. nec article 90

organizations that test products for safety are

c. nrtls

the nec is published by the

a national fire protection association

the nec is divided into

b. 9 chapters

the nec provides informative annexes for

c. informational materials and examples

two terms from nec article 100 that trainees should become familiar with are

b. labeled and listed

explanation:

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

your answer is, orbit around the nucleus

answer; how far out of place which the object finished relative to the starting location;