Why does atomic radius decrease across a period quizlet?
As you go across a period the atomic radius decreases because the number of protons increases which makes the pull of the nucleus stronger, pulling in and shrinking the electron cloud.
Why does atomic radius decrease from top to bottom?
The number of energy levels increases as you move down a group as the number of electrons increases. Each subsequent energy level is further from the nucleus than the last. Therefore, the atomic radius increases as the group and energy levels increase. 2) As you move across a period, atomic radius decreases.
Why does atomic radius increase down a group quizlet?
Why does atomic radii increase as you move down a group? The number of energy levels increases as you move down a group as the number of electrons increases. Each subsequent energy level is farther from the nucleus than the previous one. Therefore, the atomic radius increases as the group and energy levels increase.
Why does the atomic radius decrease as electrons are added to a shell quizlet?
Why does the atomic radius decrease from left to right? Electrons enter the same energy level, as protons and electrons are added the force between the protons and electrons increase. The electrons are pulled closer to the nucleus making the atom smaller.
How atomic radius vary in a period and in a group?
In general, the atomic radius decreases as we move from left to right in a period with an increase in the nuclear charge of the element. The atomic radius increases when we go down a group because of the addition of an extra shell.
What happens to the atomic radius as the atomic number increases across a period explain why in terms of the number of protons?
Atomic Radius: Across a period, electrons are being added to the same energy level, but the number of protons in the nucleus increases. This attracts the energy level closer to the nucleus and the atomic radius decreases across a period.
Why does the atomic radius decrease as electrons are added to a shell?
Atomic radius decreases across a period because valence electrons are being added to the same energy level at the same time the nucleus is increasing in protons. The increase in nuclear charge attracts the electrons more strongly, pulling them closer to the nucleus.
Why does the atomic radius decrease from left to right quizlet?
How does atomic radius vary in a period and in a group How do you explain the variation Brainly?
⭕ In a period , atomic radii decrease from left to right in a period because within the period the outer electrons are added in the same valence shell and effective charge increase as the atomic number increase resulting in the increased attraction of electrons to the nucleus.
How the atomic size vary in a group and across a period explain with suitable example?
Across the period from left to right there is a decrease in atomic size with increase in nuclear charge of the element. Atomic size increases down the group because of the addition of extra shells. So, as we move from group 1 to group 18 the size of the atom will decrease due to increased effective nuclear charge.
Why atomic radii decrease with increase in atomic number?
The atomic number is the amount of protons present in the atom. As the positive charge of the atom increases the atomic radius decreases because the positive charge will bring electrons closer to the nucleus.
Why does atomic radius increase as atomic number increases?
This is because atomic number increases down a group, and thus there is an increased distance between the valence electrons and nucleus, or a greater atomic radius.
Why does the radius of an atom decrease?
Atomic radius decreases across a period because valence electrons are being added to the same energy level at the same time the nucleus is increasing in protons. The increase in nuclear charge attracts the electrons more strongly, pulling them closer to the nucleus.
How does atomic radii change across period 3?
Moving across Period 3, the number of protons in the nucleus increases – for example sodium has 11 protons, and chlorine has 17 protons. Nuclear charge increases across the period, therefore the attraction between the positively charged nucleus and negatively charged electrons increases, so the atomic radii decreases.
Why does the radius of an element increase from left to right?
Explanation: Top to bottom: because as you go down the periodic table, the energy level increases, the electrons (which is negatively charged) orbits further away from the positive nucleus, which means the attraction between the two is weak making the radius bigger. Right to left: because basically, the element in the left is in…
How does atomic radii increase as you move down a group?
Atomic Radius Trend 2: Atomic Radii Increase as You Move Down a Group The second atomic radius periodic trend is that atomic radii increase as you move downwards in a group in the periodic table. For each group you move down, the atom gets an additional electron shell.