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r-ruslan [8.4K]
3 years ago
13

Which group was fighting communists in Nicaragua in the 1980s?

Chemistry
1 answer:
stira [4]3 years ago
7 0
The answer is A, the contras  x Good luck!! :)

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Calcium has an atomic number of 20. An atom of calcium has ____ electrons in its first energy level and ____ electrons in its se
kotykmax [81]
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4 0
2 years ago
What period is the atom in?
lys-0071 [83]
It is in period 3
It is in group 17
It is a chlorine atom because it has 17 electrons which means the atomic number is 17
6 0
3 years ago
A compound with the formula C6H14 was reacted with Cl2/light to give a mixture of 5 different monochlorinated products (not incl
allochka39001 [22]

Answer:

Hexane.

Explanation:

Hello!

In this case, since the general reaction of the compound C4H14 with chlorine is:

C_6H_{14}+Cl_2\rightarrow C_6H_{13}Cl+HCl

Which stands for a substitution chemical reaction in which one chlorine is able to replace one hydrogen and therefore hydrogen chloride gives off; we infer that the initial compound, C4H14, shows off the C_nH_{2n+2} formula characteristic of alkanes; in such a way, as it has six carbon atoms, we infer it is hexane.

Best regards!

6 0
3 years ago
1. How are the valence electrons in lithium and sodium atoms different?​
Eva8 [605]

Answer:

if you look at the number at the top of the element square you can find the amount of positive atoms wich is also the amount of negative atoms. so if you count the valence electrons then that would be you difference

explanation:

Valence electrons are the amount of negative atoms on the outermost shell.

6 0
3 years ago
The presence of no subscript for an element in a chemical formula means that there is/are?
nadezda [96]

Answer:

only one atom of that element

Explanation:

Example:

   H2 O    has two hydrogenatoms and ONE Oxygen atom

4 0
2 years ago
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