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
Andrews [41]
3 years ago
6

What do the numbers listed for an element on the periodic table represent

Chemistry
2 answers:
garik1379 [7]3 years ago
8 0
The number with a lower value is the number of protons and the number with a higher value is the mass
velikii [3]3 years ago
5 0
There are usually two values you'll come across on the periodic table.

1. the atomic number.
this represents the number of protons an element has. For example, hydrogen (H) has an atomic number of 1, which means that hydrogen has only one proton.

2. the mass number.
this usually represents the number of protons and neutrons an element has. For example, carbon (C) has a mass number of roughly 12, which means that the sum of its protons and neutrons add up to about 12. We know carbon has an atomic number of 6 (6 protons) so the number of neutrons must be 6 aswell.

(the mass numbers can differ depending on which periodic table you are given)

You might be interested in
If you multiply an objects weight times it height, what value do you compute?
Doss [256]
It might calculate the volume, but you need the length as well, depending on the object.
5 0
3 years ago
Read 2 more answers
4) 4 NH3 + 3 O2  2 N2 + 6 H2O
Black_prince [1.1K]
4 NH₃ + 3O₂ --> 2N₂ + 6H₂O

First, make sure that this is a balanced equation.
There are 4 moles of nitrogen on the left side, and 4 moles of nitrogen on the right side.
There are 12 moles of hydrogen on the left side, and 12 moles of hydrogen on the right side.
There are 6 moles of oxygen on the left side, and 6 moles of oxygen on the right side.

The equation is therefore balanced, and we may proceed.

a) the mole ratio for NH₃ to N₂ is 4 to 2, which can be simplified to 2:1 or 2/1.

b) the mole ratio for H₂O to O₂ is 6 to 3, which can be simplified to 2:1 or 2/1.
6 0
3 years ago
In 100 grams of sweet peas there are 14.5 carbohydrates,5.7 grams of sugars,5.1 grams of dietary fiber, 5.4 grams of protein and
Brums [2.3K]
14.5 % carb
5.7% sugar
5.1% fiber
5.4% protein
0.4% fat
7 0
3 years ago
The voltage generated by the zinc concentration cell described by the line notation Zn ( s ) ∣ ∣ Zn 2 + ( aq , 0.100 M ) ∥ ∥ Zn
Oxana [17]

Answer:

0.193 M

Explanation:

We need to calculate the Zn²⁺ concentration at the cathode where reduction occurs which is the right side in the expression:

Zn2+(aq,0.100 M) ‖ Zn2+(aq,? M) | Zn(s)

Zn²⁺ (aq,?) + 2 e⁻   ⇒ Zn (s)

and oxidation will occur in the anode

Zn (s) ⇒ Zn²⁺ (aq, 0.100 M ) + 2 e⁻

and the overall reaction is

Zn²⁺ (aq,?) ⇒ Zn²⁺ (0.100 M )

The driving force is the difference in concentration and E the electromotive force will be given by

E = Eº - 0.0592/2 log [Zn²⁺ (0.100 M) / Zn²⁺ (M) ]

Plugging the value for E and knowing Eº is cero because we have the same electrodes, we have

17.0 x 10⁻³ = 0 - 0.0592 log 0.100/ X =

- 17.0 x 10⁻³ / 0.0592 = log 0.100 / X

- 0.287 = log (0.100 / X)

Taking inverse log to both sides of the equation

0.516 = 0.100 / X   ⇒ X = 0.100 / 0.516 = 0.193 M

4 0
3 years ago
Which factor causes chemical weathering​ it for science
VMariaS [17]

Answer:

acid or sunlight

Explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • 7. Fredrick wanted to find out what soil works best for growing roses. He grew them in potting
    11·1 answer
  • Calculate the percent by mass of C in pentaerythritol (C(CH2OH)4)
    6·2 answers
  • I’m stuck on this. Help ASAP
    8·1 answer
  • La primera célula de un nuevo ser es
    8·1 answer
  • If the following reaction is carried out with 50.0g of Na2S and 35.0g of AgNO3, which is the limiting reactant?
    10·1 answer
  • PLZZ HELP ME ASAP
    9·2 answers
  • HELP QUICK!!
    15·2 answers
  • The process shown was used by Mendel during his experiments. What is the process called?​
    12·1 answer
  • Two groups were tasked to measure the mass of the metal objects given by their teacher. Rachel’s group has the following data fo
    9·1 answer
  • If an object has a temperature of 0 kelvin, how much energy is the object emitting? what is the wavelength of light emission acc
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!