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Atomic Mass increases across a period due to the addition of protons and neutrons in the nucleus as you move from left to right on the Periodic Table. Each element in a period has one more proton and typically one more neutron than the previous element, which contributes to a greater overall mass. Additionally, the increasing positive charge of the nucleus attracts electrons more strongly, but this does not directly affect atomic mass. Thus, the cumulative effect of added nucleons leads to the observed increase in atomic mass across a period.
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What is the trend in atomic mass going down a group?
The atomic mass will increase. As you go down a group in the periodic table the atomic number rises, this increase in the number of protons is accompanied by an increase in the number of neutrons to stabilise the nucleus, and both together lead to an increase in atomic mass.
What is the ionic radius trend across a period?
Atoms increase in size as you go down a column and are larger going from right to left across a row.because while going from left to right in a period electrons enter in the same orbit and hence the attraction between the nucleus increasees
Does nuclear charge increases as you move from left to right across the periodic table?
moving from left to right across a period, one electron is added for each element.example: Boron has 3, Carbon has 4.
What trends do you notice about the atomic number and atomic mass as you move left to right across the table?
they increase by one going from left to right totally a guess
What trend can be observed among the atomic radii of main-group elements down a group?
The atomic radii of main-group elements generally increase down a group. This is because as you move down a group, the principal quantum number increases, leading to larger atomic orbitals and a greater distance between the nucleus and the outermost electron, resulting in a larger atomic radius.
How does the atomic number change in a period?
When going left to right across a period, the atomic number of element increases.
What is the trend in atomic mass going down a group?
The atomic mass will increase. As you go down a group in the periodic table the atomic number rises, this increase in the number of protons is accompanied by an increase in the number of neutrons to stabilise the nucleus, and both together lead to an increase in atomic mass.
What is the ionic radius trend across a period?
Atoms increase in size as you go down a column and are larger going from right to left across a row.because while going from left to right in a period electrons enter in the same orbit and hence the attraction between the nucleus increasees
Does nuclear charge increases as you move from left to right across the periodic table?
moving from left to right across a period, one electron is added for each element.example: Boron has 3, Carbon has 4.
What trends do you notice about the atomic number and atomic mass as you move left to right across the table?
they increase by one going from left to right totally a guess
What is the periodic trend for elctronegativity?
Electronegativity generally increases across a period from left to right due to an increase in effective nuclear charge, making it harder for atoms to release electrons. It tends to decrease down a group as the atomic size increases, leading to weaker attraction for valence electrons.
What general trend in electronegativity do you note going down a group across a period?
going down a group, electronegativity decreases going across a period, electronegativity increases
How IS The electronegativity trend relates to the first ionization energy trend?
Electronegativity and first ionization energy both increase going up the Periodic Table.
When you move across the periodic table from left to right what happens to the number of protons contained by each element?
the numbers increase (going right) and decrease (going left)
What trend can be observed among the atomic radii of main-group elements down a group?
The atomic radii of main-group elements generally increase down a group. This is because as you move down a group, the principal quantum number increases, leading to larger atomic orbitals and a greater distance between the nucleus and the outermost electron, resulting in a larger atomic radius.
How does the first ionization energy change going down and across the periodic table?
As you move down a group on the periodic table, the first ionization energy generally decreases due to the increasing atomic size and shielding effect of inner electrons. Across a period, the first ionization energy generally increases because the effective nuclear charge increases, making it harder to remove an electron.
Why does atomic radii decrease moving left to right across a period?
Atomic radii decrease moving left to right across a period because as you move from left to right, the number of protons in the nucleus increases, leading to a greater nuclear pull on the electrons. This increased nuclear attraction pulls the electrons closer to the nucleus, resulting in a smaller atomic radius.
