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
Irina-Kira [14]
3 years ago
9

Use the periodic table to write the electron configuration for rubidium (Rb) in noble has notation

Chemistry
1 answer:
Alexxx [7]3 years ago
4 0

Answer:

Rb: [Kr] 5s  

Step-by-step explanation:

Rb is element 37, the first element in Period 5.

It has one valence electron, so its valence electron configuration is 5s.

The noble gas configuration uses the symbol of the previous noble gas as a shortcut for the electron configurations of the inner electrons.

The preceding noble gas is Kr, so the electron configuration is Rb: [Kr] 5s.

You might be interested in
In 1909 Fritz Haber discovered the workable conditions under which nitrogen, N2(g), and hydrogen, H2(g), would combine using to
labwork [276]

Answer : 51.8 g of nitrogen are needed to produce 100 grams of ammonia gas.

Solution : Given,

Mass of NH_3 = 100 g

Molar mass of NH_3 = 27 g/mole

Molar mass of N_2 = 28 g/mole

First we have to calculate moles of NH_3.

\text{ Moles of }NH_3=\frac{\text{ Mass of }NH_3}{\text{ Molar mass of }NH_3}= \frac{100g}{27g/mole}=3.7moles

The given balanced chemical reaction is,

N_2(g)+3H_2(g)\rightarrow 2NH_3(g)

From the given reaction, we conclude that

2 moles of NH_3 produced from 1 mole of N_2

3.7 moles of NH_3 produced from \frac{1mole}{2mole}\times 3.7mole=1.85moles of N_2

Now we have to calculate the mass of N_2.

Mass of N_2 = Moles of N_2 × Molar mass of N_2

Mass of N_2 = 1.85 mole × 28 g/mole = 51.8 g

Therefore, 51.8 g of nitrogen are needed to produce 100 grams of ammonia gas.

5 0
3 years ago
Normal red blood cells slide easily through narrow blood vessels. In sickle cell disease, many red blood cells change to a cresc
dybincka [34]

Answer:

C. The child must have inherited sickle cell genes from both parents.

Explanation:

Because of the fact that sickle cell disease is recessive, the child would have to get the gene from both parents.

8 0
2 years ago
Read 2 more answers
Which of the following is required for photosynthesis to take place?
Nonamiya [84]

Answer: Answer is D, water

Explanation: Water is the correct option among all and other options like sugar, oxygen and ATP are the products of the photosynthesis. Water is required along with other reactants to produce these products.

5 0
2 years ago
Read 2 more answers
A 100.0 mL sample of 0.200 M HCl is mixed with a 100.0 mL sample of 0.205 M NaOH in a coffee cup calorimeter. If both solutions
Bas_tet [7]
I just need more points that's why I'm doing this
8 0
3 years ago
1. How many calcium atoms are in 8CaOH?
Vedmedyk [2.9K]

Answer:

8

Explanation:

the number before the abbrviation for calcium (Ca) shows how many calcium there is.

6 0
2 years ago
Read 2 more answers
Other questions:
  • What is the density of aluminum?
    12·1 answer
  • Debscribe each of the following with the correct term
    5·1 answer
  • Which element has the ground state electron configuration 1s22s22p63s23p3?
    7·1 answer
  • A colligative property of a solution is one that depends 1. on the identity of the solute and the concentration of the solution.
    11·1 answer
  • 3. After the isotope decays, what is the nucleus called?||
    14·1 answer
  • Please help me please
    12·1 answer
  • What is the percent composition of silicon dioxide, SiO2 ? (Atomic masses : O = 16 . 0 Si =28 .1
    6·1 answer
  • What is the mass percentage of JUST water in the hydrate CuSO4 ∙5H2O? The molar mass for the whole compound is 249.71 g/mol.
    14·1 answer
  • In a 5.609g of H20, how many molecules H20<br> arc<br> present?
    5·1 answer
  • How many formula units are there in 14.50 moles of any compound?<br> ___X 10^___formula units
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!