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
alexandr1967 [171]
2 years ago
11

Elements with atomic numbers 7 and 83 have how many valence electrons? *

Chemistry
1 answer:
IRINA_888 [86]2 years ago
5 0

Explanation:

element with atomic numbers 7 and 83 have 5 and 5 valence electrons

You might be interested in
PLEASE PLEASE PLEASE​ ANSWER HAVE MERCY 35 POINTS
Arada [10]
You should give answers since some people will just try and find any answer, which happened to me. So like if you have answers for the question just put them like A B C D kinda like true or false for others to know what they got instead of giving them more work, and then they just give you random answers.
6 0
3 years ago
Write a balanced chemical equation for the standard formation reaction of gaseous hydrogen fluoride hf
pychu [463]
The  standard  state formation reaction  is  a  chemical  reaction  in  which one  moles  of  substance  in  its  standard state  is formed from  its constituent  element in  their  standard  state.All  the  substance must  be  in  their  most stable  state  at  100kpa  and  25  degrees  celsius.
therefore  for  HF is
1/2H2 +1/2F2 =HF
6 0
3 years ago
Read 2 more answers
Carbon burns in the presence of oxygen to give carbon dioxide. Which chemical equation describes this reaction?
Vlad1618 [11]

Answer: option B.

carbon + oxygen → carbon dioxide

Explanation:

8 0
3 years ago
Read 2 more answers
In the wintertime, you decide to buy a helium balloon at Dollar Tree. It is fully
Gemiola [76]

Answer:

The reason that the balloon shrinks is because when the temperature drops, helium becomes more dense then it already is. So what happens is that its molecules lose energy, slows down and moves closer together to conserve heat and this decreases the volume inside the balloon because the helium molecules are moving closer together, rather than outward toward the shell of the balloon which cause the balloon to swell then shrink. The gas law that causes this to happen is the Charles law.

Explanation:

5 0
3 years ago
Read 2 more answers
Eading and
4vir4ik [10]

Answer: 25.8 g of Cl_2 will be produced from the decomposition of 73.4 g of AuCl_3

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of} AuCl_3=\frac{73.4g}{303g/mol}=0.242moles

The balanced chemical reaction is:

2AuCl_3\rightarrow 2Au+3Cl_2  

According to stoichiometry :

2 moles of AuCl_3 produce =  3 moles of Cl_2

Thus 0.242 moles of  will produce= \frac{3}{2}\times 0.242=0.363mol of Cl_2

Mass of Cl_2= moles\times {\text {Molar mass}}=0.363mol\times 71g/mol=25.8g

Thus 25.8 g of Cl_2 will be produced from the decomposition of 73.4 g of AuCl_3

5 0
2 years ago
Other questions:
  • Assessment timer and count Assessment items Item 3 What condition would most likely cause a decrease in the salinity of ocean wa
    11·1 answer
  • A certain element consists of two stable isotopes. the first has a mass of 68.9 amu and a percent natural abundance of 60.4 %. t
    12·1 answer
  • When computing using dimensional analysis:
    7·1 answer
  • What type of matter is made of only one kind of atom
    9·2 answers
  • What is the oxidation number of cl− in the perchlorate ion
    13·1 answer
  • What is DNA?I am so confused please help!
    12·2 answers
  • An ion has 24 protons and 19 electrons. Write the symbol for this ion.
    9·1 answer
  • Members of which group easily lose an electron to form a +1 cation? halogens alkaline earth metals noble gases alkali metals
    7·2 answers
  • What is the density of a substance that has a volume of 14 millimeters and a mass of 13.2 grams.
    5·1 answer
  • Water particles are both cohesive and adhesive. What does this mean? How do these behaviors differ?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!