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
Veronika [31]
3 years ago
6

Which of the following are true for an element?       (i)Atomic number= number of protons + number of electrons      (ii)Mass nu

mber = number of protons+ number of neutrons      (iii)Atomic mass= number of protons= number of neutrons      (iv)Atomic number = number of protons = number of electrons​
Chemistry
1 answer:
fredd [130]3 years ago
4 0

Answer:

<em>ii</em><em> </em><em>and</em><em> </em><em>iv</em><em> </em>

Explanation:

atomic mass is the sum of protons and neutrons

protons ( postively charged) usually have the same number like electrons( negatively charged)

You might be interested in
A rigid plastic container holds 1.00 l methane gas at 660 torr pressure when the temperature is 22.0 degrees Celsius. How much p
igor_vitrenko [27]
 <span>PV/T = P'V'/T' 
660 x 1.00/295.2 = P' x 1.00/317.8 
P'=710.5 torr</span>
6 0
3 years ago
Read 2 more answers
What makes salt an ionic compound?
Bond [772]
Salt<span> consists of positive sodium </span>ions<span> </span><span> and negative chloride </span>ions<span> </span>
6 0
3 years ago
I need help
qaws [65]

D) All three bulbs would go out because the circuit would no longer have a ground thereby deeming it "open".

5 0
4 years ago
The presence of a large population of _____________ indicates water depleted of oxygen and a high level of organic pollution.
blondinia [14]

The presence of a large population of sludgeworms indicates water depleted of oxygen and a high level of organic pollution.

The sludgeworms Tubifex is harvested and sold as tropical fish food since it is common near sewer outlets and serves as a sign of water or organic pollution. Polychaetes are crucial in rearranging the silt on the ocean floor.

Organic contamination happens when too much organic material, such sewage or manure, gets into the water.

There will be more decomposers and sludgeworms in a pond as the organic content accumulates. These decomposers and sludgeworms develop quickly and consume a lot of oxygen as they do so.

Hence, Sludgeworms are a sign of an abundance of oxygen-depleted water and significant levels of organic pollutants.

Learn more about Water pollution here brainly.com/question/1235358

#SPJ4

6 0
1 year ago
This problem is from a New York Times article. Researchers tested a group of 28 doctors. The doctors were told that a 5-year-old
telo118 [61]

Answer:

0.12 mL of the epinephrine solution.

Explanation:

We have:

A bottle of epinephrine labeled 1 mg in 1 mL of solution,

We need to prepare:

An injection of 0.12 mg of epinephrine

Hence:

\frac{1 mL}{1 mg}*0.12 mg = 0.12 mL

Therefore, to prepare an injection of 0.12 mg of epinephrine labeled 1 mg in 1 mL we need to inject 0.12 mL of the epinephrine solution.          

I hope it helps you!

7 0
3 years ago
Other questions:
  • what is the pressure, in atmospheres, of 2.97 mol h2 gas if it has a volume of 73 liters when the temperature is 298 k? 0.50 atm
    11·1 answer
  • Consider the substitution reaction that rakes place when (R)-3-bromo 3-methylhexane is treated with methanol. Which of the follo
    5·1 answer
  • Write chemical equations and corresponding equilibrium expressions for each of the two ionization steps of carbonic acid. Part A
    11·1 answer
  • Mass defect is associated with:
    13·1 answer
  • In what way did Rannan make an error in his scientific process? He should not use a systemic process. He should not use his opin
    16·2 answers
  • What is the pH of a solution that has a concentration of 1 X 10-3 hydrogen ions?
    14·1 answer
  • Y’all know I’m adopted yup and I jus finally got the parents I’ve wanted my whole life❤️ thank u all besties
    13·1 answer
  • Hydrogen gas is collected over water in an inverted buret. If the atmospheric pressure is 745 mm Hg, the vapor pressure of water
    11·1 answer
  • Which of these choices is the best definition of absolute dating?
    6·1 answer
  • PLEASE HELP!! <br> this is on USAtestprep <br> a)<br> b)<br> c)<br> d)
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!