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german
3 years ago
15

Most elements occur in nature as a single isotope. TRUE FALSE

Chemistry
2 answers:
cestrela7 [59]3 years ago
8 0

Answer:

false

Explanation:

because elements never exist in nature as single isotopes they are always combined

lubasha [3.4K]3 years ago
4 0

Answer:

FALSE

Explanation:

in the cases of three elements (tellurium, indium, and rhenium) the most abundant isotope found in nature is actually one (or two) extremely long-lived radioisotope(s) of the element, despite these elements having one or more stable isotopes.

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2 years ago
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Represent the formation of cations for the following metal atoms using electron dot structures. (a) Al (b) Sr (c) Ba​
vagabundo [1.1K]

the formation of cations by using electron dot structures are :

a) Al

.

Al .    losing the three valence electrons makes the Al³⁺

.

b) Sr :  

  Sr :  losing the two valence electrons makes Sr²⁺

c) Ba

: Ba , losing the two valence electrons makes it Ba²⁺

A Lewis electron dot diagram is a representation of the valence electrons of an atom that employments specks around the image of the element. The number of dots equals the number of valence electrons within the molecule. These dots are arranged to the right and left and over and underneath the symbol, with no more than two dots on a side. Cations are the positive ions shaped by the loss of one or more electrons. The foremost commonly shaped cations of the representative elements are those that include the loss of all of the valence electrons.

To know more about the lewis electron dot diagram refer to the link brainly.com/question/14191114?referrer=searchResults.

#SPJ9

3 0
1 year ago
!!!!HURRY!!!! What reaction is endothermic?
Alex

Answer:

The reaction in which heat is absorbed from the surrounding is called endothermic reaction.

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I think it's answer is 2nd option.

4 0
3 years ago
The answer to the question?
Artemon [7]

Answer:

atomic particles

The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).

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3 years ago
The volume of a gas is 5.0 L at 278 K. If the temperature of the gas
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