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
24g of magnesium reacts with 38 g of fluoride o produce __ g magnesium fluoride
Oksana_A [137]

Answer: 62g

Explanation: You add 24g and 38 grams because when a substance reacts with another substance there is the same amount of grams in the product, so there would be 62 grams in the product because that is the amount of grams there is in the reactants.

7 0
3 years ago
What element is solid at room temperature shiny malleable and a good conductor of heat
Aliun [14]

Answer:

I believe that it would be copper because copper is all of those things.

Explanation:

6 0
3 years ago
An isotope with a mass number of 193 has 116 neutrons. What is the atomic number of this
Zinaida [17]

Answer:

Atomic number of this  isotope = 77

Explanation:

Given that,

Mass number = 193

No of neutrons = 116

We need to find the atomic no of this isotope.

We know that,

Atomic mass = No of protons + No. of neutrons

Also, atomic no = no of protons

So,

Atomic mass = atomic no + No. of neutrons

⇒ Atomic no = Atomic mass - no of neutrons

Atomic no = 193 - 116

Atomic no = 77

Hence, 77 is the atomic no of the isotope.

6 0
3 years ago
Which scientist invented the first simple Microscope ?
Vinvika [58]

Answer:

D.  Leeuwenhoek

Explanation:

6 0
3 years ago
Purest form of carbon is
vladimir2022 [97]

Answer:

Obtención. El carbono se encuentra - frecuentemente muy puro - en la naturaleza, en estado elemental, en las formas alotrópicas diamante y grafito. El material natural más rico en carbono es el carbón (del cual existen algunas variedades). Grafito: Se encuentra en algunos yacimientos naturales muy puro.

4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the color of bromcresol green indicator in a solution with a pH of 2.0
    9·1 answer
  • Place the following compounds in order of increasing vapor pressure. methane, CH4; pentane, CH3CH2CH2CH2CH3; 1-propanol, CH3CH2C
    5·2 answers
  • Which group on the periodic table are the last reactive? A alkali metals B alkaline earth metals C halogens D noble gases
    8·1 answer
  • Which electromagnetic waves are used in ovens and cell phone communications
    8·2 answers
  • Which of the following represents a molecule?
    15·2 answers
  • Can someone help? Ill give brainliest!
    5·1 answer
  • B. Directions: Identify the factors affecting the different seasons in the Philippines.
    8·1 answer
  • Which type of molecule is shown below?
    10·1 answer
  • I really need help, i don’t understand this at all
    15·1 answer
  • (i)Draw an arrow to show the activation energy on the diagram.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!