All categories

4 years ago

Write the electron configurations for the first 10 elements on the periodic table

Chemistry

1 answer:

dusya [7]4 years ago

4 0

Explanation:

H - 1s¹

He - 1s²

Li - 1s² 2s¹

Be - 1s² 2s²

B - 1s² 2s² 2p¹

C - 1s² 2s² 2p²

N - 1s² 2s² 2p³

O - 1s² 2s² 2p⁴

F - 1s² 2s² 2p⁵

Ne - 1s² 2s² 2p⁶

pls give me brainliest!!!

You might be interested in

As Period of Revolution (Increases or Decrease),Your age (Increases or Decreases or Stays the same)

xxMikexx [17]

Answer:

increase , my age increase

Explanation:

hope it helps..

6 0

3 years ago

Metallic elements can be recovered from ores that are oxides, carbonates, halides, or sulfides. Give an example of each type.

vredina [299]

Metallic elements which can be recovered from ores that are oxides, carbonates, halides, or sulfides are iron, zinc, silver and lead respectively.

Ores which is deposited in earth's crust which contain minerals and metals. Metals can be obtained economically and sold commercially.

<h3>How metals obtained from sulphide or carbonate ore? </h3>

As we get to know that it is easy to obtain metals from their oxides. So, firstly ores which is found in the form of carbonates and sulphide are converted into their oxides by using the process of calcination and roasting.

The metals which is in the middle of the activity series are moderately reactive. These metals are found in the crust of the earth is mainly found as oxides, sulphides, or carbonates.

A metal which can occur in the form of sulphide ore is lead.

A metal which can occur in the form of oxide ore is iron.

A metal which can occur in the form of carbonate ore is zinc.

A metal which can occur in the form of halides ore is silver.

Thus, we concluded that the metallic elements which can be recovered from ores that are oxides, carbonates, halides, or sulfides are iron, zinc, silver and lead respectively.

learn more about ore:

brainly.com/question/10306443

#SPJ4

6 0

1 year ago

How many moles of O₂ are needed to react completely with 35.0 mol of FeCl₃? *

densk [106]

Answer:

26.3 moles of O₂ are needed to react completely with 35.0 mol of FeCl₃

Explanation:

To determine the number of moles of O₂ that are needed to react completely with 35.0 mol of FeCl₃, it is possible to use the reaction stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), and rule of three as follows: if 4 moles of FeCl₃ react with 3 moles of O₂, 35 moles of FeCl₃ with how many moles of O₂ will it react?

$molesofO_{2} =\frac{35 moles of FeCl_{3}*3 moles of O_{2} }{4 moles of FeCl_{3}}$

moles of O₂= 26.25 ≅ 26.3

<u><em>26.3 moles of O₂ are needed to react completely with 35.0 mol of FeCl₃</em></u>

7 0

3 years ago

What is the biological significance of the temperature at which the amylase catalyzed reaction

ipn [44]

Answer:

The biological significance is that it is the normal human body temperature and also the optimum temperature of the enzyme.

Explanation:

Enzymes are biological catalysts that speed up the rate of chemical reactions.
Enzymes catalyze specific reactions by working on a specific substrate to convert it into a product.
The rate of enzyme activity depends on several factors which include pH, temperature, substrate concentration, and enzyme concentration among others.
Enzymes work best at a specific pH and temperature known as optimum pH and optimum temperature respectively.
In this case, enzyme amylase works best at a temperature of 37° C which is equivalent to the normal human body temperature.

7 0

3 years ago

Which element has the same number of valence electrons as hydrogen (H)? A. helium (He). . B. oxygen (O). . C. nitrogen (N). . D.

deff fn [24]

Li is in group 1 so it has same number of valence electrons as hydrogen.
hope it helps.

4 0

3 years ago

Read 2 more answers