Answer:
Cl is more likely to than Na
Explanation:
The question asks for the element more take up an electron from the other
The ability of an atom to take take or give electrons in a chemical reaction, depends on its electron affinity and ionization energy, respectively
Chlorine, Cl, has the highest electron affinity in the periodic table which makes it attract electrons more towards itself
Sodium, Na, has a low ionization energy (about 2/5 of that of chlorine) than chlorine, Cl, making sodium more readily able to give its valence electron in a reaction
Therefore, Cl is more likely to take up an outer electron from Na.
b. 56.00 s ( a time measured by a stopwatch)
c. 4 choices ( the number of choices in this list)
d. 3 lbs ( the weight of an object measured on a scale )
Answer: a. 2.54 cm ( the number of centimeters in exactly 1 in) and c. 4 choices ( the number of choices in this list)
Justification:
1) a. 2.54 cm ( the number of centimeters in exactly 1 in)
Although the exact length of one inch has varied in the past, currently the inch is defined as exactly 2.54 cm, so this is an exact number.
b. 56.00 s ( a time measured by a stopwatch)
The time measured by a stopwatch is not an exact number. The number is limited by the precision of the instrument (the stopwatch) and it migh have been 56.004 instead of 56.00, and the stopwatch cannot shoe that. So, this is not an exact number.
c. 4 choices ( the number of choices in this list)
This is, indeed an exact number. It is 4, not 4.1, nor 3.9, nor any other number.
d. 3 lbs ( the weight of an object measured on a scale )
As reasoned with the stopwatch, this measure, 3 lbs, is subject to the precision of the scale. It is not an exact number. It could be other number close to 3: 2.99 for example.
These are exact numbers: c. 4 choices ( the number of choices in this list) and d. 3 lbs ( the weight of an object measured on a scale )
The exact number is a value that is known with complete certainty. Examples are counted numbers of objects or certain unit conversions such as exactly 3 feet in 1 yard. Another example is, a dozen is defined as 12 objects, and a pound is defined as 16 ounces.
Fraction an exact number is a fraction takes two integers and places them in a ratio, for example 3/4 or 10/15. A decimal can express the same numerical quantity, but it does so with a single number (like 0.75 or 0.66). So, the fraction makes the relationship among numbers clear in the way it is written.
While a decimal can express the same numerical quantity, but it does so with a single number (like 0.75 or 0.66).
a. 2.54 cm ( the number of centimeters in exactly 1 in) is decimal
b. 56.00 s ( a time measured by a stopwatch) is not exact numbers
c. 4 choices ( the number of choices in this list) is exact numbers
d. 3 lbs ( the weight of an object measured on a scale ) is exact numbers
Grade: 9
Subject: chemistry
Chapter: exact number
Keywords: exact number
13
25
37
Answer:
The correct answer for the number of neutrons in this atom is: 13
Explanation:
Hello! Let's solve this!
The atomic number indicates the number of protons in the nucleus.
The mass number is the sum of protons and neutrons in the nucleus.
So, we have to make the difference between both numbers.
25-12 = 13
The correct answer for the number of neutrons in this atom is: 13
Answer: The correct answer is neutrons.
Explanation:
There are 3 subatomic particles that are present in an atom. They are: protons, electrons and neutrons.
Protons carry positive charge and are found inside the nucleus of an atom.
Electrons carry negative charge and are found around the nucleus in the orbits.
Neutrons does not carry any charge and are found inside the nucleus of an atom.
Hence, the correct answer is neutrons.
B. nuclear separation.
C. nuclear fission.
D. nuclear fusion.
Answer is: C. nuclear fission.
Nuclear fission is a nuclear reaction or a radioactive decay where nucleus of atom split into smaller ligher nuclei.
Nuclear fission is exothermic reaction which release large amounts of energy (electromagnetic radiation or as kinetic energy, which heat reactors where fission reaction take place).
Answer: The process of splitting of an atom into two lighter atoms is called is called nuclear fission.
Explanation:
There are two types of nuclear decay reactions:
Hence, the process of splitting of an atom into two lighter atoms is called is called nuclear fission.
(2) Ca (4) Na
double-replacement reaction.
c.
replacement reaction.
b.
decomposition reaction.
d.
combustion reaction.
The equation A + BX = AX + B represents a single-replacement or displacement reaction in Chemistry, where a more reactive element replaces another in a compound to form a new compound and releases the displaced element.
The equation A + BX = AX + B is a representation of a general single-replacement reaction, also known as a displacement reaction in Chemistry. In this type of reaction, a more reactive element (in this case represented by A) displaces or replaces another element (represented by B) in a compound, resulting in a new compound and a separate element as products. Here, A replaces B in the compound BX, leading to the formation of the new compound AX and the release of element B.
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