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MariettaO [177]
3 years ago
12

What is the electron configuration for Sodium (Na)?

Chemistry
2 answers:
SpyIntel [72]3 years ago
8 0
The electron configuration for Sodium (Na) is [Ne] 3s1
Airida [17]3 years ago
5 0
Sodium is the 11th element in the periodic table so it will have 11 electrons (if you're not sure if something is right always check how many electrons they're are it's like checking your work in math). There are 4 energy "types" in the periodic table: S,P,D and F. Starting from the top left you are in the first energy level 1 (in the S area which is always the first two elements on the left of the table before the transition metals) and there are two elements (hydrogen and helium) so you have 1s^2 then you go down to the second column and you have the first two elements which are Lithium and Beryllium so your next config is 2s^2. Now you have more elements on the left and those are in the "P energy section" and there are 6 elements there so you put 2p^6. Now you move down again and you're in the 3rd energy level and sodium is the 1st element and so you only need to put 3s^1. Your econfig is 1s^2 2s^2 2p^6 and 3s^1
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The cell theory was construted by​
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Answer:

Matthias Jakob Schleiden

Explanation:

The cell was initially discovered by Robert Hooke, but Schleiden developed the theory.

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Explain why even though it may be sunny outside its not as warm during the summer ​
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In the process of attempting to characterize a substance, a chemist makes the following observations: (a) The substance is a sil
Amiraneli [1.4K]

The question is incomplete, this is the complete question;

In the process of attempting to characterize a substance, a chemist makes the following observations. Which are physical properties and which are chemical properties?

(a) The substance is a silvery white, lustrous metal.

(b) The substance melts at 649 ∘C

(c) The substance boils at 1105 ∘C.

(d) The density of the substance at 20 ∘C is 1.738 g/cm³.

(e) The substance burns in air, producing an intense white light.

(f) The substance reacts with chlorine to give a brittle white solid.

(g) The substance can be pounded into thin sheets or drawn into wires.

(h) The substance is a good conductor of electricity.

Answer:

(a) Physical

(b) Physical

(c) Physical

(d) Physical

(e) Chemical

(f) Chemical

(g) Physical

(h) Physical

Explanation:

(a) The substance is a silvery white, lustrous metal - is appearance which is physical.

(b) The substance melts at 649 ∘C metling point is a physical measurement

(c) The substance boils at 1105 ∘C boiling point is a physical measurement

(d) The density of the substance at 20 ∘C is 1.738 g/cm3 how heavy a substance is,is physical.

(e) The substance burns in air, producing an intense white light. Burning is a chemical change. It is a reaction of a substance with oxygen

(f) The substance reacts with chlorine to give a brittle white solid. This is a chemical reaction as the question says.

(g) The substance can be pounded into thin sheets or drawn into wires. Ductility is a physical change, the substance remains chemically unchanged

(h) The substance is a good conductor of electricity. Any conductivity is physical, the substance remains chemically unchanged

7 0
3 years ago
CaC2 + 2H2O → C2H2 + Ca(OH)2 If 2.8 moles of CaC2 are consumed in this reaction, how many grams of H2O are needed?
Strike441 [17]

Answer:

Cac2 is a answer please mark me brainliest

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