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
pshichka [43]
3 years ago
12

Sodium (Na) and potassium (K) are in the same group in the periodic table. Sodium is in the 11th position. How many valence elec

trons does potassium have?
Biology
2 answers:
choli [55]3 years ago
8 0

Explanation:

Valence electrons are the electrons which are present in the outer most shell of an atom or element.

Since both potassium and sodium are same group elements and it is known that elements of same group contain same number of valence electrons.

For example, atomic number of potassium is 19 and its electronic distribution is 2, 8, 8, 1.

Hence, we can conclude that there is one valence electron present in valence shell of potassium atom.

Rama09 [41]3 years ago
6 0
Potassium is just below the sodium in periodic table in s group !

so the valence electron of sodium and potassium is same and that is 1 !
You might be interested in
Please answer quickly
HACTEHA [7]

Answer:

which one is it 9 42 or 12?

3 0
3 years ago
Fill in the blank Competition drives natural selection as individual members of a species compete with each other for limited na
maks197457 [2]

Answer:

1. Intraspecific

2. speciation

3. fossil record

4. The fossil record provides empirical evidence for evolution because it shows that species now aren't the same as species that existed in the past and that small changes happen over time to create new species.

5. A geographic variation in the fossil record occurs when two similar organisms occupy the same time span in two different places. These organisms hold the same purpose within the overall ecology.

6. A more detailed fossil record is preferable for supporting evolution because it allows for the instances of gradual change to be recorded and placed into broader speciation events.

7. Fossils provide a great many intermediaries that connect past species with their living descendants.

8. Intraspecific competition is competition that occurs within species. This is the competition that drives natural selection.

Explanation:

penn foster

8 0
4 years ago
Aquatic ecologist david strayer of the institute of ecosystem studies and a team of researchers from new york state's department
Sedaia [141]
In communities where zebra mussels have invaded we observed that the population of invertebrates, zooplankton, and phytoplankton they will decrease when in open water. The population of bottom-dwelling invertebrates which are in the littoral zone will increase.
Hypothesis shows the zebra mussels will affect the fish negatively that feed on plankton in the open water but affect positively the fish which feed on invertebrates which are in the littoral zones.
The predictions by following the invasion of zebra muscles show that the number and growth rate of fish species in open water will decrease in population whereas the number and growth rate of fish species in the littoral zone will increase in population.
5 0
3 years ago
Nnh-jzpz-tyg. join today link fast guys please​
Ilya [14]

Answer:

HMMM DID ANYONE JOIN ON URS?

Explanation:

8 0
3 years ago
How do scientists know about the structure of the earth?
Andrew [12]

Answer:

I think it's " P waves from earthquakes can travel through both solids and liquids so they tell us what is inside the earth.  "

Explanation:

8 0
4 years ago
Other questions:
  • Which cellular organelles is responsible for modifying,sorting,and packaging proteins and lipids
    15·1 answer
  • What can a cold or flu pill do for a body?
    12·1 answer
  • Wich Organism can produce the highest number of genetically different gametes?
    5·1 answer
  • The bacteria grown in Luria broth with only lactose were expected to: Select one: a. Grow much faster than those grown in Luria
    15·2 answers
  • The portion of the brain associated with motor control is the ________
    10·1 answer
  • what are the three kinds of neuron? How do they work together to produce a response to an environmental stimulus
    6·1 answer
  • Why do monosaccharide sugars burn faster than polysaccharides?
    14·1 answer
  • If a DNA strand is composed of 30% adenine (A), how much thymine (T) would be present out of 100%?
    7·1 answer
  • Which type of mutation happens when an organism has extra genetic material?
    12·2 answers
  • 1. A man treated his home with a pesticide that kills roaches. The first application of the
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!