Approximately how many elements are represented on the periodic table?

Answers

Answer 1

Answer:

There are about 50 to 100 elements on the periodic table.

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Related Questions

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3. Which BEST compares compounds and mixtures? A Compounds and mixtures contain a variety of elements, but the elements in a mixture do not retain their original characteristics when combined.  B Compounds and mixtures contain a variety of elements, but the elements in a mixture are able to last longer because they are chemically combined.  C Mixtures can be made up of elements and compounds that lack definite proportions, but a compound is composed of elements that are present in definite proportions.
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Select the correct answer.The largest coral reef in the Western Hemisphere is located off which country's coast?
A.
Belize
B.
Mexico
C.
Trinidad and Tobago
D.
Cuba

Answers

Answer:

Explanation:

Answer:

The answer is A. Belize

Which is the present geological Era

Answers

Answer:

Cenozoic era

Explanation:

The geological time scale consists of three eons: Archaean, Proterozoic and Phanerozoic. The Phanerozoic eon is divided into three era which are namely: Paleozoic, Mesozoic and Cenozoic era. Cenozoic era extends from “end-Cretaceous extinction” to the present day. It is dominated by mammals and is also called as the “age of mammals”.

5) How are Parkinson's disease and ALS similar?A) Both diseases are communicable.
B) Both diseases affect muscle control.
C) Both diseases can be prevented with vaccines.
D) Both diseases are caused by an unhealthy lifestyle.

Answers

B) because Parkinson's disease make the muscles "shake" and ALS weakens the muscles.

What are the possible genotypes if the offspring

Answers

Answer:

50%

Explanation:

The reason why it is 50% is because the offspring gets 50/50 from both parents

Short pea plants exist in the P1 and F2 generations. What happens to the phenotype in the F1 generation?

Answers

Answer:B:The allele for short pea plants is masked during the F1 generation, but is still present in the genotype

Explanation:

I took the test

Answer is B

Explanation:

Describe what happens when you step on a pin ( this is about the nervous system )

Answers

The pin is the stimulus and your skin is the receptor. Your skin sends an electric impulse which travels in a sensory neuron. The electrical impulse travels over synapses by going through a chemical reaction. It travels to your central nervous system. as a motor neuron, it then is an effector which your body shows the response to. The response is you quickly lifting your foot up.

Other Questions

Greek philosophers such as Democritus and Aristotle had ideas about the composition of matter. For example, Democritus believed matter was made of tiny, solid spheres that he called atomos, and Aristotle thought matter was made of earth, water, fire, and air. Aristotle's idea of matter was the accepted idea for over 2,000 years until John Dalton came up with a new theory about matter based on his experimental data. Which of the following best explains why Dalton’s theory became more widely-accepted over Aristotle's theory?Aristotle’s theory did not have enough direct evidence due to poor observational tools.Dalton’s theory had repeated observations which were supported by extensive evidence.Dalton’s theory was more complete because more respected scientists found the ideas possible.Aristotle’s theory became the law of conservation of mass when he documented phase changes of matter.

Each amino acid in a protein is specified by a three base sequence called ?

How many mL of water would be displaced by 408 g of lead

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