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
sukhopar [10]
3 years ago
7

On the periodic table how many periods are there and how many columns are there

Chemistry
1 answer:
mestny [16]3 years ago
8 0
There are seven periods with eighteen columns in the periodic table.
You might be interested in
What is the pOH value of 0.0000877 M HCL
ki77a [65]

Answer:

pOH=9.9

Explanation:

pH=-log[H+]= -log[0.0000877]

=4.06

pOH+ pH=14

pOH=14-4.06= 9.91

7 0
3 years ago
 Some
Misha Larkins [42]
<span>density is defined as mass per volume.. so 94 mL makes no sense.</span>
7 0
3 years ago
What is the current model of atom
leonid [27]

Answer:

The bohr model is the model in use today

7 0
2 years ago
Which substance has a chemical formula with the same ratio of metal ions to nonmetal ions as in potassium sulfide?
pav-90 [236]
Answer=1

Potassium Sulfide= K2S (two metals, one non metal)


Sodium Oxide=Na2O (two metals. one nonmetal)

Sodium Chloride=NaCl (one metal, one nonmetal)

Magnesium Oxide=MgO (one metal, one nonmetal)

Magnesium Chloride=MgCl2 (one metal, two nonmetals)
6 0
3 years ago
Read 2 more answers
Why does a red object appear red?
NeTakaya

Answer:

Objects appear different colours because they absorb some colours (wavelengths) and reflected or transmit other colours. ... For example, a red shirt looks red because the dye molecules in the fabric have absorbed the wavelengths of light from the violet/blue end of the spectrum

8 0
3 years ago
Read 2 more answers
Other questions:
  • An experimental procedure requires 10 ml of acid to be dissolved into a beaker of water. An additional 5 ml of acid is added to
    7·2 answers
  • how many moles of carbon monoxide can be produced from 8 moles of carbon if carbon is the limiting reagent?
    12·1 answer
  • I WILL GIVE BRAINLIEST TO BEST AND MOST THOROUGH ANSWER!
    15·1 answer
  • Thx please help thx thx
    11·1 answer
  • How does the size of the atom (atomic size) change as you move from the LEFT side to RIGHT side of the Periodic Table?
    10·2 answers
  • "A student takes 152 mL of a 3.0M HCl solution and places it into a beaker. The student then adds enough water to the beaker to
    6·1 answer
  • WHAT IS THE UNKNOWN METAL?
    10·1 answer
  • Las diferencias fundamentales del entramado urbano antes y despues de 1750​
    8·1 answer
  • Fe + CuCl2 → FeCl2 + Cu
    6·1 answer
  • When aqueous solutions of calcium bromide and potassium carbonate are combined, solid calcium carbonate and a solution of potass
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!