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
Marianna [84]
2 years ago
6

The element that doesn't occur in elemental state in nature is​

Chemistry
1 answer:
Pepsi [2]2 years ago
4 0

Answer:

technetium, atomic number 43; promethium, number 61; astatine, number 85; francium, number 87; neptunium, number 93; and plutonium, number 94.

Explanation:

You might be interested in
Based on the observations of how the different forms of salt start mixing with the
zimovet [89]
I would expect fine salt to fully dissolve by the end of 45 minutes. Since the other types of salt are not fine and tiny, they would take longer to dissolve
7 0
3 years ago
Read 2 more answers
Which of these has a neutral ph? select one:<br> a. distilled water<br> b. salt water<br> c. milk?
lapo4ka [179]
Distilled water has the a neutral ph. Pure water always has a ph of 7.
5 0
3 years ago
Briefly explain why adding salt to icy roads helps melt the ice and prevent it from freezing again.
g100num [7]

Answer:

See explanation below

Explanation:

The melting point (the temperature that it changes from solid to liquid) of a pure substance depends on its mass, the forces between its molecules, and the pressure of the system.

The melting point, or the freezing point, of a mixture, is a temperature between the melting point of its components. Salt has a huge negative melting point, so when it is added to the water, the melting point decreases from 0ºC to -21ºC approximately.

So, the water will only freeze again if the temperature becomes below -21ºC which is very difficult to happen.

3 0
3 years ago
What changes happens when you run ?
oksano4ka [1.4K]

Answer:

It increases endurance, builds muscle to maintain an optimal body fat composition, promotes cardiovascular health, strengthens the heart, and even improves your overall mood. Combined with weight training, running can help you maintain the perfect balance of mental stimulation and physical fitness.

Explanation:

4 0
3 years ago
What type of inter-molecular forces are present in C12H22o11 (AKA sugar)
Fed [463]
Since the molecule contains Hydrogen and is covalently bonded, it contains dipole-dipole forces and hydrogen bonds.
3 0
3 years ago
Other questions:
  • An emulsifying agent is typically characterized by having ____. a. one polar end c. two polar ends b. one nonpolar end d. one po
    13·1 answer
  • Identify the number of neutrons in one atom of sulfur with an isotopic mass number of 34 Amu
    8·1 answer
  • Explain why the following primary substrate undergoes SN1 very rapidly (the OTs is the leaving group)?
    7·1 answer
  • Draw the structure of the aromatic compound para-aminochlorobenzene (para-chloroaniline). Draw the molecule on the canvas by cho
    5·1 answer
  • A gas mixture contains sulfur trioxide at a pressure of 1.45 atm and sulfur dioxide at a pressure of 0.32 atms. What is the tota
    6·1 answer
  • I gave brainlest:: answer this .....​
    6·1 answer
  • 1. To calculate the molarity of a solution, you need to know the moles of solute and the
    15·1 answer
  • Select the correct image.
    8·1 answer
  • Imagine you are working in the lab and your chemical bottle is labeled Fe2O3. Explain how you could
    6·1 answer
  • A hypothetical element, E, has two stable isotopes. One isotope has a natural abundance of 68.037% and has an atomic mass of 46.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!