Answer:
B. Carbon and Hydrogen
Explanation:
An alkyne can be regarded as unsaturated hydrocarbon which have at least one carbon—carbon triple bond. They are acyclic aliphatic hydrocarbons, they can be (branched or unbranched) , They have general chemical formula of [ CₙH₂ₙ−2]. One of the compound belonging to this family is Propyne( C3H4) Hence, they contain Hydrogen and Carbon.
Alkenes can be regarded as class of hydrocarbons which posses only carbon and hydrogen, they are unsaturated compounds having least one carbon-to-carbon double bond.
alkenes can also be regarded as "olefins". one of the members of this family is Ethene (C2H4). general formula of alkenes can be written as [C nH 2n],
n=number of carbon atoms present in the molecule
Answer:
A.) a proton is gained
Explanation:
A.) is correct. Protons are located in an atom's nucleus. As you travel to the right on a period, the elements are gaining more protons. For instance, magnesium, which is one space to the right of sodium, has one more proton than sodium.
B.) is incorrect. Like protons, as you travel to the right across a period, each element gains another electron. However, while the statement itself is true, <u>electrons are not located in an atom's nucleus</u>.
C.) is incorrect. Like protons, as you go across a period, the number of <u>neutrons in the nucleus increases</u>, not decreases.
D.) is incorrect. As noted in B.), the number of electrons in each element increases across the period. Therefore, as more electrons surround the nucleus, the <u>electron cloud size increases</u>.
Answer:
Option C:
1s2 2s2 2p6 3s1 3p4
Explanation:
At a ground level, Phosphorous has an electronic configuration of 1s2 2s2 2p6 3s2 3p3 (using the spdf notation).
Once the atom becomes excited, an electron from the 3s sub-level will gain energy and jump over to the 3p sub-level, making the configuration 1s2 2s2 2p6 3s1 3p4.
The number of electrons at the 3p sub-level will now become 4 because of the addition of the new electron while the number of atoms at the 3S sub-level will reduce to 1 because an electron left this sub-level.
The answer is C. If u want to know how just ask.
Anwser: 4:15
You add 45 minutes to 30 minutes which comes out to be 75 minutes, subtract that from 60 because there are only 60 minutes in an hour, which is 15.. so it's 4:15