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
nirvana33 [79]
3 years ago
15

The atomic number of lithium is 3. How many neutrons does an atom of lithium have if it is represented by the symbol shown below

Chemistry
2 answers:
Nataly [62]3 years ago
7 0
The answer is 4 neutrons
Hope this helped!
Luba_88 [7]3 years ago
5 0

Answer:

Lithium has 4 neutrons

Explanation:

The number shown above the lithium symbol (Li) is the mass number.

The mass number (A) represents the protons and neutrons an atom has.

The atomic number(Z) in the other hand represents the protons only.

So, the difference between this two numbers is the amount of neutrons.

n_{neutrons}=A-Z=7-3=4

You might be interested in
What part of the food. chain is a pine?
Otrada [13]
Producer. Hope this helps!
7 0
2 years ago
Which of the following is not true of a scientific theory?
Furkat [3]

Answer: a,b

Explanation: because a scientific theory is something that been thought of and tested multiple times.

3 0
2 years ago
What types of evidence do scientists use to determine evolutionary relationships among groups
lions [1.4K]
There are several things that can help scientists evaluate which category something belongs to. The similarity in features is one of them. If two skulls looked alike, they were probably species of the same evolutionary category. For example say humans and monkeys rather than humans and dogs.
Similarly fossils have helped scientists categorise species. Study of the chromosomes (in cases with available chromosomes) can help scientists figure out a lot about the subjects and categorise them. 
5 0
2 years ago
Nitrogen dioxide decomposes to nitric oxide and oxygen via the reaction: 2NO2 → 2NO + O2 In a particular experiment at 300 °C, [
Setler [38]

Answer:

rate=-1.75x10^{-5}\frac{M}{s}

Explanation:

Hello,

In this case, for the given information, we can compute the rate of disappearance of NO₂ by using the following rate relationship:

rate=\frac{1}{2}*\frac{C_f-C_0}{t_f-t_0}

Whereas it is multiplied by the the inverse of the stoichiometric coefficient of NO₂ in the reaction that is 2. Moreover, the subscript <em>f</em> is referred to the final condition and the subscript <em>0</em> to the initial condition, thus, we obtain:

rate=\frac{1}{2}*\frac{0.00650M-0.0100M}{100s-0s}\\\\rate=-1.75x10^{-5}\frac{M}{s}

Clearly, it turns out negative since the concentration is diminishing due to its consumption.

Regards.

3 0
3 years ago
Which variable is tested during a lab investigation
Licemer1 [7]
Actually, it could indeed be the independent variable.
5 0
3 years ago
Other questions:
  • If element X has 25 protons, how many electrons does it have?
    6·2 answers
  • List the three great pioneers of rocket science and their contributions.
    14·2 answers
  • When measuring water using the graduated pipette, the mass of beaker and the water is 23.670 g. If the empty beaker weighs 13.71
    5·1 answer
  • The substances in a chemical reaction that are combined or separated to form new substances are the _______.
    13·2 answers
  • Upon combustion, a 0.8009 g sample of a compound containing only carbon, hydrogen, and oxygen produces 1.6004 g CO2 and 0.6551 g
    7·1 answer
  • The number used to measure distances outside of our solar system is a(n)
    6·1 answer
  • Here’s another science question;( one more after this !
    10·1 answer
  • Identify each process numbered 1-6
    7·1 answer
  • What is the intermolecular force of NiCl2
    12·1 answer
  • Which member of each pair is more soluble in diethyl ether? Why?<br> (a) NaCl(s) or HCl(g)
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!