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ella [17]
3 years ago
11

1. Find the elements magnesium, cesium, and nitrogen on the periodic table. a. What monoatomic ions would each form? Write this

with the appropriate symbol abbreviation. Be sure to use subscripts or superscripts as necessary. Example: Al3+ (5 points) b. Then, given what you know about chemical bonding, give the formulas for the types of ionic compounds they would produce with each other. Be sure to use subscripts or superscripts as necessary. Explain how you determined this. No credit without an explanation. (10 points)
Chemistry
1 answer:
aliya0001 [1]3 years ago
7 0

a. <em>Monatomic ions </em>

Cs is in Group 1. It has <em>one valence electro</em>n that it can lose to form a Cs⁺ ion.

Mg is in Group 2. It has <em>two valence electrons</em> that it can lose to form an Mg²⁺ ion.

N is in Group 15. It can gain <em>three valence electrons</em> to complete its octet and form an N³⁻ ion.

b. <em>Ionic compounds</em>

In an ionic compound there must be the same number of positive and negative charges.

It takes <em>three Na⁺ ions</em> to balance the charge on <em>one N³⁻ ion</em>, so the formula of sodium nitride is Na₃N.

It takes <em>three Mg²⁺ ions</em> (charge = +6) to balance the charge on <em>two N³⁻ ions</em>

(charge = -6), so the formula of magnesium nitride is Mg₃N₂.

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Na-23 has 12 neutrons. What is it’s atomic number?
erastovalidia [21]

Answer:

11

Explanation:

The atomic number = number of protons. The mass number (23) = sum of number of neutrons and protons. Since you know the mass number is 23 and it has 12 neutrons, 23-12 gives you 11 protons, so its atomic number is 11.

If you want additional help in chemistry or another subject for FREE, check out growthinyouth.org

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3 years ago
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Smoking marijuana can be as unhealthy as smoking cigarettes and ___________
Afina-wow [57]
The answer is all of them. But in a school situation, A would be appropriate. This is because the smoke gets into the smokers lungs, whether it be marijuana or tobacco, and can cause cancer cells to grow in your lungs and enter your bloodstream.
So A is the answer. 
3 0
3 years ago
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Which of the substances below would dissociate into ions when dissolved in water? Select all that apply.
dusya [7]

Answer:

B. NaBr

D. KOH

Explanation:

Below is the solubility rules given for you knowledge.

Salts of

  • Group 1 elements are soluble(Li^+, Na^+, K^+,Cs^+, Rb^+)
  • Ammonium ion is soluble (NH4^+)
  • The nitrate are generally soluble( NO3^-)
  • of Cl- , Br- , and I- are soluble, except Ag+ , Pb+2, and (Hg2)+2
  • most sulfate are soluble, except Ba+2, Ca+2,Pb+2, Ag+, Sr+2.
  • most hydroxide salts are only slightly soluble, except NH+4, Li+, Na+, K+
  • Most carbonates are insoluble (CO3 2-) Except group 1 and NH+4
  • most phosphate are insoluble except group 1 and NH+4  

so using the rules above

NaBr , KOH are soluble, Pb(OH)2 is slightly soluble and AgCl is not soluble.

7 0
3 years ago
How many moles would you need to have 7.85 x 10^22 molecules of ammonia (NH3).
RSB [31]
<h3>Answer:</h3>

0.130 moles NH₃

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Chemistry</u>

<u>Atomic Structure</u>

  • Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

  • Using Dimensional Analysis
<h3>Explanation:</h3>

<u>Step 1: Define</u>

[Given] 7.85 × 10²² molecules NH₃

[Solve] moles NH₃

<u>Step 2: Identify Conversions</u>

Avogadro's Number

<u>Step 3: Convert</u>

  1. [DA] Set up:                                                                                                      \displaystyle 7.85 \cdot 10^{22} \ molecules \ NH_3(\frac{1 \ mol \ NH_3}{6.022 \cdot 10^{23} \ molecules \ NH_3})
  2. [DA] Multiply/Divide [Cancel out units]:                                                         \displaystyle 0.130355 \ moles \ NH_3

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

0.130355 moles NH₃ ≈ 0.130 moles NH₃

3 0
3 years ago
Why would the political scientist wish to consult multiple sources of information on a topic
mel-nik [20]

to prove that all of the information that he has gathered is concrete and constant information

3 0
3 years ago
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