Answer:
The repeating nature of physical and chemical properties with atomic number
Explanation:
Periodic table is designed in a way in which elements are divided in groups and periods. Periods are rows and groups are columns. The elements in groups share similar properties due to the same number of valence electrons they have. Going along each period, we'll always get back to the same group at some point. This is why we have periodic trends, the trends repeat gradually when we finally reach the same group we're analyzing.
Physical and chemical properties vary periodically. For example:
- atomic radius decreases from left to right along the period;
- ionization energy increases from left to right along the period;
- electronegativity increases from left to right along the period;
- metallic properties decrease from left to right along the period.
The answer is C am to bored to explain ♀️
Answer:
it is usually a restaurant that is located all over a certain country.
If it’s not katrina, it’s bob. katrina’s is right because gravity is keeping the bird on the perch, but the perch is also holding the bird off of the ground.
Answer:
170 mL
Explanation:
<u>The total volume to be reported should be 170 mL.</u>
According to the significant rule in mathematical operations, final answers are usually reported to reflect the accuracy of the least accurate number.
In this case, the least accurate of all the volumes has zero significant digits after the decimal, hence, the final answer after the mathematical operation should also have no significant digits after the decimal.
18 + 128.7 + 23.45 = 170.15
<em>Therefore, the total volume to be reported when significant digits are taken into account would be </em><em>170 mL.</em>