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Halogens become less reactive down the column of the Periodic Table due to the increase in atomic size and the decrease in effective nuclear charge. As you move down the group, the atomic radius increases, leading to a decrease in the attraction between the outer electrons and the nucleus. This decrease in effective nuclear charge results in a weaker hold on the outer electrons, making it more difficult for halogens to gain an electron and exhibit their characteristic reactivity.
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ProfessorIt's easier for halogens to gain an electron than to let seven electrons go to become reactive.
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The further down the column you go the more electron shells in between the nucleus and the outside shell there are and so it has less 'pulling power' to grab that extra electron.
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Are the halogens most reactive nonmetals or the least reactive nonmetals?
The Halogens are the most reactive non-metals. However, their reactivity decreases as you go down the group. Most reactive Fluorine>Chlorine>Bromine>Iodine>Astatine Least reactive. However, Astatine is not fully characterised because it is radio-active, and consequently is not found in open(school) labs.
What is 0.794 rounded to the nearest hundredth?
0.79
What is 527040 to the nearest ten thousand?
To round look at the place value column to the right of the ten thousands column (the thousands column) - if it is 5 or more, the number rounds up, otherwise it rounds down. In 527,040 the thousands column is 7 which is 5 or more, so it rounds up. 527,040 → 530,000 to the nearest ten thousand.
How do you round off to the tens place?
Whether to round up or down depends on the digit in the units column. If the unit value is less than 5, you round down, if the unit value is 5 or above, round up. For example: 12 (The unit column contains a 2, which is less than 5, so round down) becomes 10 15 (The unit column contains a 5, which is 5 or above, so round up) becomes 20
What is 8053 to the nearest thousand?
To round to a place value column, look at the next column to the right: if it is 5 or more round up otherwise round down. To the nearest thousand look at the hundreds column. In this case it is 0, so the number rounds down: 8053 → 8000 to the nearest thousand.
