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
horsena [70]
3 years ago
8

The number of dots around an element symbol in a Lewis dot structure equals the total number of electrons in an atom of that ele

ment.
True or False?
Chemistry
1 answer:
strojnjashka [21]3 years ago
8 0
The number of dots represents the amount of valence electrons, which is the same as the last digit of the elements group number in ptof.
You might be interested in
Which of the following accurately describes the behavior of water when subjected to temperature change?
77julia77 [94]
I believe this is the best one:
B. The volume of water will increase if cooled from 3°C to 2°C.

I don't think D) because water expands from 4°C to 0°C

"When liquid water is cooled, it contracts like one would expect until a temp of approximately 4 degrees Celsius is reached. After that, it expands slightly until it reaches the freezing point."
3 0
3 years ago
Read 2 more answers
PLEASE I NEED HELP NOW!!! I WILL GIVE 25 POINTS
padilas [110]
If I did this correctly the balanced equation would be:
14H⁺+Cr₂O₇²⁻+6I⁻→3I₂+2Cr³⁺+7H₂O

oxidation half: (iodide was oxidized)
2I⁻→I₂+2e⁻

reduction half: (chromium was reduced)
14H⁺+Cr₂O₇²⁻+6e⁻→2Cr³⁺+7H₂O

H⁺ comes from the solution.  It is in the final reaction since in redox reactions the oxygen is turned into water since it can't just go away.  I multiplied the oxidation half reaction by 3 in order for both half reactions to half the same number of electrons since equal numbers of electrons need to be lost and gained for the reaction to be balanced.

I hope this helps.  Let me know if anything is unclear.
8 0
3 years ago
We are trying to build a good model of the _____________ that are happening on the tectonic plates under us.
Arturiano [62]

Answer:

scientists can only calculate the probability that a significant earthquake will occur in a specific area within a certain number of years.

Explanation:

i'm in the 7th grade

8 0
3 years ago
All samples of an element are composed of atoms with the same
inysia [295]

Answer is: 2. atomic number.

Atomic number is unique and defines an element. Atomic number (Z) is total number of protons in an atom.

For example, nitrogen atom (N-14) has 7 protons (p⁺), 7 electrons (e⁻) and 7 neutrons (n°). Protons (positive charge) and neutrons are in the nucleus of atom, electrons (negative charge) are bound to the nucleus in spherical shells.  Nitrogen is an element with atomic number 7.                                                       Mass number (A) is the total number of protons and neutrons in a nucleus. Nitrogen mass number is 14 (A = p⁺ + n°; A = 14).


3 0
3 years ago
Read 2 more answers
How can you determine the specific heat of a metal using a calorimeter
zhannawk [14.2K]

Answer:

One can determine the specific heat of the metal through using the clarimeter, water, thermometer and using heat equations.

Explanation:

You can learn about heat effects and calorimetery through a simple experiment by boiling water and heating up the metal in it. Then, pour it into your calorimeter and the heat will flow from the metal to the water. The two equlibria will meet: the metal will loose heat into its surroundings (the water) and teh water will absorb the heat. The heat flow for the water is the same as it is for the metal, the only difference being is the negative sign indicating the loss of the heat of the metal.

In terms of theromdynamics, we can deteremine the heat flow for the metal becasue it would be equal to the mangnitued but opposite in direction. Thus, we can say that the specific heat of water qH2O = -qmetal.

4 0
2 years ago
Other questions:
  • Which property increases with increasing atomic number for both the alkali metals and the halogens?
    15·1 answer
  • S Which could occur in a closed system?
    7·1 answer
  • Explain why gasoline will not dissolve in water.
    12·2 answers
  • How many grams of NaCl are contained in 0.50 L of a 4.20 M solution?
    7·1 answer
  • 1.36x10^22molecules Fe2O3 to grams
    14·1 answer
  • You can identify an element if you know its Atomic number or ___.<br> Fill in the Blank.
    9·2 answers
  • -) A sample of oxygen had an initial volume of 25.0L and was at a standard pressure of
    10·1 answer
  • Which of the following is a pure substance?
    15·1 answer
  • How many atoms are in TWO water (H20) molecules?
    6·2 answers
  • Which statement best describes the movement of energy?.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!