How many atoms lie in a straight line in the molecule 2-butyne, ch₃c≡cch₃?
a. 10
b. 8
c. 6
d. 4
e. 2

The carbons from the double link lie in a straight line, together with the neighbouring carbons. The hydrogens lie in a tetrahedrical configuration, so none could be counted. Final 4.

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom