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
hoa [83]
3 years ago
11

How many protons are in an element with an atomic number of 8 and a mass number of 18

Biology
2 answers:
dexar [7]3 years ago
6 0
There are 8 protons in an element with an atomic number of 8. Atoms are numbered after their number of protons. The number of protons is what defines the element. If the number of protons were to change, the element would not be the same, but another different one. That's why the number of protons is single to each element and they are numbered after them.
The atomic number is many times represented by the letter Z.
elena-s [515]3 years ago
4 0
8 protons because a element always has the same number of protons as its atomic number
You might be interested in
You have a 12 sided cube that is numbered from 1 to 12. What is the probability of rolling a five?
nadezda [96]

Answer:

1/12

Explanation:

Formula for calculating probability:

            Probability of an outcome A =

     Number of favorable outcomes of A / Number of possible outcomes

       P ( A )  = number of favorable outcomes to A / total number of outcomes

⇒ The number of times 5 can appear when you roll the 12 sided cube once is one time   =  1

⇒ The total number of possible outcomes is 12 - meaning you can roll any number between 1 - 12 when you roll the dice once.   = 12

Therefore the probability of rolling 5  = 1 /12

 Probability = 1 / 12

hope this help and brainiest please. thx

8 0
3 years ago
Read 2 more answers
Babies with very low or very high birth weight are less likely to survive. The graph shows the percentage of babies born at
dalvyx [7]

Answer:

Option C is correct.

The information provided clearly shows that the babies with average weights form a stable selection, the average is favoured.

Stabilizing selection is occurring because the average is favored.

Explanation:

Concluding Part of the question

A graph entitled Percentage of Babies born at Different Weights has weight in pounds on the horizontal axis, and percentage on the vertical axis. A small percentage of babies are born at the low and higher birth weights, and a greater amount are around 7 to 8 pounds.

Which statement is a valid claim that could be made using the data in the graph?

A) Directional selection is occurring because the graph favors an extreme.

B) Disruptive selection is occurring because the two extremes are favored.

C) Stabilizing selection is occurring because the average is favored.

D) Biodiversity variation is occurring because there is an increase in trait variation.

Explanation

Stabilizing selection represents a form of natural selection where the intermediate variants of a trait, that is the non-extreme trait values are the ones that ensure the survival and subsequent formation of stable population of the species with this average traits.

In this question, it is given through the data from the graph that babies with very low or very high weights are less likely to survive.

And it is logical as very low weight babies are most likely to be very weak, fragile and susceptible to being on the wrong side of natural selection and very high weight babies have all sorts of overweight issues plus the fact that they have to literally be squeezed out of the womb through a very narrow canal, really pushing their oversight bodies to its limits very early making them also susceptible to being on the wrong side of natural selection.

The average weight babies on the other hand do not experience any of the issues discussed in the last paragraph, they are usually healthy and thus have a high survival rate. So, it is evident to see that the population of babies stabilizes based on a particular non-extreme trait value (baby weight) through stabilizing selection.

Hope this Helps!!!

8 0
3 years ago
Brainstorm and create a list of 4 human activities that interfere with ecosystems, food chains and food webs. For each explain h
Brums [2.3K]
Here are some things that interfer with the ecosystem (highways, driving cars, fossil fuel, cities, farms, deforestation, over hunting, over fishing and plastics)
4 0
3 years ago
Read 2 more answers
Snowshoe hares are related to rabbits and live in cold regions. In warm weather, they have a brown coat and spend many hours fee
Mariana [72]
Having white fur in the winter to blend in with the snow
7 0
3 years ago
A dog starts chasing Gretchen. When her brain sends a signal to her muscles to run, which neurons are at work?
zzz [600]
Motor neurons are at work
6 0
3 years ago
Read 2 more answers
Other questions:
  • Charles Darwin developed his theories of evolution based on wildlife observations on which famous islands of Ecuador?
    11·2 answers
  • Why can carbon from very large molecules?​
    8·1 answer
  • During fractional crystallization mineral crystals _____________.
    9·1 answer
  • The sex of mammals is determined by:
    12·1 answer
  • According to the Focus on Neuroscience box on the adolescent brain, the amount of gray matter in the brain peaks at about age __
    12·1 answer
  • What are the types of pollination? How is one advantages over the other method?
    15·1 answer
  • Answer and ill give brainliest, show your proof and statements
    10·1 answer
  • HELP PLEASEE
    12·2 answers
  • Fe + CuSO4 → Cu + FeSO4
    14·2 answers
  • 4. Examine the codon chart and list all of the codons that code for
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!