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
DIA [1.3K]
3 years ago
10

4. Write the electronic configuration of first 20 elements in the periodic table.

Chemistry
1 answer:
DIA [1.3K]3 years ago
7 0

Answer:

Name Atomic Number Electron Configuration Period 1 Hydrogen 1 1s1 Helium 2 1s2 Period 2 Lithium 3 1s2 2s1 Beryllium 4 1s2 2s2 Boron 5 1s2 2s22p1 Carbon 6 1s2 2s22p2 Nitrogen 7 1s2 2s22p3 Oxygen 8 1s2 2s22p4 Fluorine 9 1s2 2s22p5 Neon 10 1s2 2s22p6 Period 3 Sodium 11 1s2 2s22p63s1 Magnesium 12 1s2 2s22p63s2 Aluminum 13 

You might be interested in
The atomic mass of an element is equal to the number of:
aleksklad [387]
Atomic mass is protons and neutrons, because they both have a mass of 1 amu. Electrons have so little mass that they can be ignored. The answer is therefore B, protons plus neutrons
4 0
4 years ago
Read 2 more answers
If the forces acting on an object are unbalanced, what will occur?
S_A_V [24]

Answer:

The answer is acceleration.

Explanation:

Acceleration- When it comes to science, Force is defined as a "push or pull" of an object with mass that causes it to change velocity.

Balanced Force- This occurs when two forces of the same mass or size are acting on a particular object in opposite direction. The object being acted upon could <em>either stay in its place or move in a uniform speed and direction.</em>

Unbalanced Force- This occurs when the forces applied are not equal and are of different direction. For example, a 55-kg person pulling a 30-kg cart. The cart will move to the direction of the pull.

Thus, when forces acting on an object are unbalanced, it causes the object to accelerate. This acceleration is directly proportional to the "net force", but is inversely proportional to the mass or size.

<u>A net force</u> is the total amount of force that is acting on the object.

6 0
3 years ago
How many moles of He are in 16 g of the element? 1.0 mol 4.0 mol 8.0 mol 16 mol
Lady bird [3.3K]

Answer: 4 Mole

Explanation:

16/4 = 4

4 0
4 years ago
Explain the process of rainwater harvesting with its advantages .
leva [86]

Answer:

the environmental benefits of rain water harvesting

Explanation:

rainwater harvesting can reduce stormwater runoff a property by reducing stormwater runoff rainwater harvesting can reduce is term peak flow volume and velocity in local cricket stream and rivers thereby reducing the potential for stream Bank erosion

4 0
3 years ago
Whats the name?!?!?!??!?!?!?!?!?!?!!?!?!?!??!?!?!?!
SIZIF [17.4K]
Hydrogen i suppose is the right one
7 0
3 years ago
Other questions:
  • Element z reacts with bromine to form an ionic compound zbr2
    11·1 answer
  • Convert 11.03 moles of calcium nitrate to grams
    9·2 answers
  • What is the ph of a solution containing the strong base ba(oh)2 at a concentration of 0.064 mol/l?
    12·1 answer
  • What is the molality of an aqueous solution containing FeCl3 (MM = 162.2 g/mol) with a mole fraction of FeCl3 of 0.15?
    6·1 answer
  • Choose the aqueous solution below with the lowest freezing point. These are all solutions of nonvolatile solutes and you should
    13·1 answer
  • Which of the following statements could be true regarding polar molecules? Choose one or more: A polar molecule will not contain
    7·1 answer
  • In the laboratory, a volume of 100 mL of sulfuric acid (H2SO4) is recorded. How many g are there of the liquid if its density is
    14·1 answer
  • Somebody please answer
    10·1 answer
  • How many CARBON atoms are present in 2C3H8O3 ?
    13·1 answer
  • I have made a thermometer which measures temperature by the compressing and expanding of gas in a piston. I have measured that a
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!