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MaRussiya [10]
3 years ago
11

How many Orbits does the element Radium (Ra) have?

Chemistry
1 answer:
Pani-rosa [81]3 years ago
7 0
Radium atoms have 88 electrons and the shell structure is 2.8.18.32.18.8.2.
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What is true of a solution with a pH of 12
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It is alkaline ........I need 20 characters......
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3 years ago
At the center of every atom lies a small, dense ____________ that is positively charged
Sedbober [7]
At the center of every atom lies a small, dense "nucleus" that is positively charged.

Atom is the smallest unit of matter. It is made up of electrons, protons and neutrons. Electrons are negatively charged particles that are found scattered in different energy levels outside the nucleus. Protons are positively charged particles present inside the nucleus. Neutrons do not carry charge and found inside the nucleus. Thus, protons and neutrons make up the nucleus of an atom. Since, protons are positively charged and neutrons are uncharged particles, the charge of nucleus becomes positive. 
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3 years ago
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Which phrases describe all the outer planets' motion? Check all that apply.
viktelen [127]
  1. answer:fast rotation. 2. explanation: I choose this as my answer because when the outer planets orbit it move faster
3 0
3 years ago
Determine the value of the equilibrium constant, Kgoal, for the reactionN2(g)+H2O(g)⇌NO(g)+12N2H4(g), Kgoal=?by making use of th
Black_prince [1.1K]

Answer:

K_{goal}=1.793*10^{-33}

Explanation:

N2(g)+O2(g)⇌2NO(g), K_1 = 4.10*10^{-31}

N2(g)+2H2(g)⇌N2H4(g), K_2 = 7.40*10^{-26}

2H2O(g)⇌2H2(g)+O2(g), K_3 = 1.06*10^{-10}

If we add above reaction we will get:

2N2(g)+2H2O(g)⇌2NO(g)+N2H4(g)                     Eq (1)

Equilibrium constant for Eq (1) is K_1*K_3*K_3

Divide Eq (1) by 2, it will become:

N2(g)+H2O(g)⇌NO(g)+1/2N2H4(g)                       Eq (2)  

Equilibrium constant for Eq (2) is (K_1*K_3*K_3)^{1/2}

Equilibrium constant =K_{goal}= (K_1*K_2*K_3)^{1/2}\\K_{goal}= (4.10*10^{-31} *7.40*10^{-26}*1.06*10^{-10})^{1/2}\\K_{goal}=1.793*10^{-33}

7 0
3 years ago
I need all the answers ASAP
Bezzdna [24]

Answer:

explanation

Explanation:

Magnesium-

a. Solid

b. Metal

c. Natural

d. Mg

e. Alkaline earth metals

Ill answer the rest if you can mark brainliest

7 0
2 years ago
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