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
Over [174]
3 years ago
13

Which element has four energy levels? Na,K,Cs,Rb

Chemistry
2 answers:
Ann [662]3 years ago
7 0
Potassium K 

ajkdhfkhad fhhlkahdfiuh pao
Alik [6]3 years ago
6 0

Answer:

The correct option is: Potassium

Explanation:

Sodium, Potassium, Rubidium and Caesium are referred to as the alkali metals that belong to the group 1 of the periodic table, thus having one valence electron in their outer or valence shell.

Sodium, atomic number 11, belongs to the period 3 of the periodic table. It has <u>three shells</u> and the number of electrons per shell is 2, 8, 1.

Potassium, atomic number 19, belongs to the period 4 of the periodic table. It has <u>four shells</u> and the number of electrons per shell is 2, 8, 8, 1.

Rubidium, atomic number 37, belongs to the period 5 of the periodic table. It has <u>five shells</u> and the number of electrons per shell is 2, 8, 18, 8, 1.

Caesium, atomic number 37, belongs to the period 6 of the periodic table. It has <u>six shells</u> and the number of electrons per shell is 2, 8, 18, 18, 8, 1.

<u>Therefore, </u><u>Potassium</u><u>, atomic number 19, has four shells or energy levels.</u>

You might be interested in
Elements are simple ___
storchak [24]

Answer:

particles

atoms

broken

isotope

conductors

electricity

element

combined

3 0
3 years ago
Distinguish between atom molecules, and ions
NNADVOKAT [17]

Explanation:

Atoms are the smallest unit of matter that can't be broken down chemically. Molecules are groups of two or more atoms that are chemically bonded. Ions are atoms or molecules that have gained or lost one or more of their valence electrons and therefore have a net positive or negative charge.

7 0
3 years ago
Hows everyone doing? tell me about your day in the comments thingy. mine aint going so great :/
GarryVolchara [31]

Answer:

Mine is doing good since I dont have any school today it makes it better. Im listening to scary stories on YT right now which always makes my day better so Im having a really good day today!

What about you? Why isn't your day doing so great?

6 0
3 years ago
What is the most important monosaccharide on Earth?
Nikolay [14]
Probably the most important monosaccharide on earth is Glucose. it is used in many bodily functions and it a key source of energy

5 0
3 years ago
I need to repost cause I did it wrong and the price was blank, but imma mark BRAINLIEST on this one :D
k0ka [10]

Explanation:

I'm pretty sure 1. yes 2. no and 3. it might be yes but I'd just put a maybe

5 0
3 years ago
Other questions:
  • Which colloid is more stable milk or ice cream and how do you know
    10·2 answers
  • How many electrons are lost from oxygen? CO2 + H2 —&gt; CO + H2O
    13·2 answers
  • Because of ocean acidification, it is expected that in 2050 the mass of CaCO3 deposited annually in coral reefs will be 20% less
    9·1 answer
  • 1. The heat absorbed when ice melts can
    15·1 answer
  • 1. In your own words, differentiate absorption, reflection, refraction.
    6·1 answer
  • Drag the tiles to the correct boxes to complete the pairs.
    11·1 answer
  • Write the word and balanced chemical equations for the reaction between:
    7·2 answers
  • Which element has chemical properties most similar to carbon (C)?
    10·2 answers
  • Helpppppppppp!!!!!!!!!​
    14·1 answer
  • Describe how you would make 6.0 L of a 0.100 M KCl solution from a 4.0 M stock KCl solution.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!