1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
miv72 [106K]
3 years ago
12

PLEASE HELP ASAP!!!

Chemistry
2 answers:
alexdok [17]3 years ago
8 0

Answer:

Answers are bellow.

Explanation:

The element with electron configuration 1s22s22p63s1 belong I A group in the periodic table and it is sodium because it loses one electron.

We have periodic table in attachments.

Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table, because it has a single electron in its outer shell, which it readily donates, creating a positively charged ion—the Na+ cation. Its only stable isotope is 23Na.

The free metal does not occur in nature, and must be prepared from compounds.

It is soft metal, reactive and with a low melting point.

AveGali [126]3 years ago
5 0

Answer:

Explanation:

The vertical columns of the periodic table are known as groups, while the horizontal rows of the periodic table are called periods. All the elements that belong to a group have the same valence, and therefore, they have characteristics or properties similar to each other. That is, in each group the elements with the same number of electrons appear in the last occupied level or valence shell. For example, all elements in group 13 contain 3 electrons in their outermost shell.

On the other hand, in each period the elements appear whose last level of their electronic configuration coincides with the number of the period. For example, period 3 includes elements whose outermost electrons are at level 3.

So, in this case the element belongs to period 3 and group 1. When locating it in the periodic table, the element is sodium (Na).

The alkali metals correspond to Group 1 of the Periodic Table. So sodium is an alkali metal. It is characterized by its high reactivity, due to the fact that they form chemical bonds with many types of substances and elements and that they do it easily. This is due to its high electronegativity and the ease of releasing its electron from the outermost layer.

You might be interested in
A sample of an unknown gas with a mass of 8.21 g has a volume of 4.8064 L when the temperature is 200oC and the pressure is 1.81
Pie

Answer:

The answer to your question is M = 36.49 g

Explanation:

Data

mass = 8.21 g

volume = 4.8064 L

Temperature = 200°C

Pressure = 1.816 atm

M = ?

Process

1.- Convert temperature to °K

°K = 273 + 200

°K = 473

2.- Calculate the number of moles

n = (PV)/RT

n = (1.816)(4.8064)/(0.082)(473)

n = 0.225

3.- Calculate the molar mass

            M --------------- 1 mol

           8.21 g ---------- 0.225 moles

M = (1 x 8.21)/0.225

M = 36.49 g

4 0
3 years ago
What is known about a reaction with a positive enthalpy?
MariettaO [177]

Answer: C

Explanation:

In endothermic reactions, enthalpy is positive, and in exothermic reactions, enthalpy is negative, So, if enthalpy is positive, then it is an endothermic reaction, and hence is required for the reaction to occur.

8 0
2 years ago
The site of protein synthesis or production'
aleksandrvk [35]

Answer:

The Art of Protein Synthesis

In eukaryotic cells, transcription takes place in the nucleus. During transcription, DNA is used as a template to make a molecule of messenger RNA (mRNA). The molecule of mRNA then leaves the nucleus and goes to a ribosome in the cytoplasm, where translation occurs.

Explanation:

Plz mark brainliest thanks

7 0
3 years ago
How would you prepare 100 ml of 0.4 M MgSO4 from a stock solution of 2 M MgSO4?
miss Akunina [59]
OK, so to answer this question, you will simply use the molality equation which is as follows:
<span>M1V1 = M2V2 
In the givens you have:
M1 = 2M
V1 is the unknown
M2 = 0.4M
V2 = 100 ml

</span>plug in the givens in the above equation:
<span>2 x V1 = 0.4 x 100 
</span>therefore:
V1 = 20 ml

Based on this: you should take 20 ml of the 2 M solution and make volume exactly 100 ml in a volumetric flask by diluting in water.

7 0
3 years ago
What is the chemical name for K2Se
Oduvanchick [21]

Answer:

Potassium selenide

Explanation:

Potassium selenide (K2Se)

6 0
3 years ago
Read 2 more answers
Other questions:
  • Elements are organized on the periodic table based on their properties. Which statement correctly predicts and explains the chem
    5·2 answers
  • The temperature at which a substance freezes is called its melting point. True or False
    6·1 answer
  • Explain why vegetables last longer in a fridge.
    15·2 answers
  • The number of mole of a molecule is defined as its mass per molar mass. Using # mol = n, mass = m and molar mass = M and given t
    6·1 answer
  • Consider the following standard reduction potentials: Zn2+(aq) + 2 e− LaTeX: \longrightarrow⟶ Zn(s) Eo = −0.76 V Mg2+(aq) + 2 e−
    6·1 answer
  • Why NH4 is not a molecular ion
    10·1 answer
  • What has covalent bonds
    13·1 answer
  • what does the distance traveled by each component on the paper strip in paper chromatography depend on
    7·2 answers
  • Why do solids not diffuse​
    5·2 answers
  • State the periodic law and explain how it relates to the periodic table.​
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!