Answer:
• Hydrogen and oxygen atoms
Explanation:
Hydrogen and oxygen are nonmetals. They are most likely to share electrons and form a covalent bond.
A is wrong. Gold is a metal, so it will form metallic bonds.
O is wrong. Neon is a noble gas. It has a complete octet, so it is unlikely to form covalent bonds.
D is wrong. Mg is a metal, and Br is a nonmetal. They are more likely to form ionic bonds.
From the calculations, the half life of the material is 6.5 days.
<h3>What is radioactivity?</h3>
The term radioactivity has to do with the spontaneous disintegration of a specie.
Uisng the formula;
N=Noe^-kt
N= amount at time t = 0.135 Ci or 4.995 ×10^9 Bq
No = amount initially present = 1.75 x 10^12 Bq
k = rate constant = ?
t = time taken = 55 days
Hence;
4.995 ×10^9 = 1.75 x 10^12e^-55k
4.995 ×10^9/1.75 x 10^12 = e^-55k
2.85 * 10^-3 = e^-55k
ln2.85 * 10^-3 = -55k
k = ln2.85 * 10^-3/-55
k = 0.1066 day-1
Half life = 0.693/ 0.1066 day-1
= 6.5 days
Learn more about radioactivity:brainly.com/question/1770619
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>there is restricted rotation around the carbon-carbon double bond. (TRUE)
>the stability of the carbon-carbon double bond increases as the
number of substituent groups increases. (TRUE)
>whenever the two groups on each end of a carbon-carbon double bond
are the same, two diastereomers are possible. (TRUE)
>trans alkenes are generally more stable than cis alkenes. (NOT TRUE)
Answer:
Compounds
Compounds – pure substances that are the unions of two or more elements. They can be broken into simpler substances by chemical means.
Explanation:
I would say the answer is P2O5. Some teachers use PO2.5. I'm not one of them.
