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As you move across a period in the Periodic Table from left to right, the Atomic Mass generally increases. This is due to the addition of protons and neutrons in the nucleus, which contributes to a higher mass. However, this trend is not perfectly linear, as variations in isotopes and electron configurations can cause slight fluctuations in atomic mass values. Overall, the increase reflects the addition of heavier elements as you progress across the period.
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What happens to the atomic radius as you go across a period?
It decreases as you move from left to right because there is an increase in positive charge in the nucleus as you go from left-to-right. Each time you go over an element it has one more electron and proton added to the principal energy level, so the nucleus pull increases and it holds the valence electron in tighter.
Why does atomic mass increase going across a period?
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.
What does the sequence in each period represent in relation to electrons?
The sequence in each period represents in relation to electrons is that as you look from left to right on the periodic table, you see a pattern; an increase of the atomic number. The number of electrons equals the number of protons, and the number of protons equals the atomic number.
Why does the element with lowest atomic number have the greatest atomic radii in each period?
Across the period, the total number of shells remain the same. But, atomic number, i.e., no. of protons and electrons goes on increasing. Protons (positively charged) present in the nucleus exert a nuclear charge towards the electrons (negatively charged) present around the nucleus, and pull the shells toward the nucleus. Hence, when no. of protons increases, nuclear charge also increases and hence it pulls the shells with greater force, and shells get closer to the nucleus. Hence, across the period, atomic size, or the radii go on decreasing.
What statement accurately compares the trends in atomic number and atomic mass in the period gave?
In a period of the periodic table, atomic number increases sequentially from left to right as protons are added to the nucleus of each successive element. Atomic mass typically increases as well, although it does not always correlate directly due to the varying number of neutrons in isotopes. While atomic number defines the identity of an element, atomic mass reflects both protons and neutrons, leading to a generally increasing trend in mass alongside the atomic number across a period.
What do you noticed about the atomic number in each period?
Atomic number increases from left to right across a period.
What happens to the atomic radius as you go across a period?
It decreases as you move from left to right because there is an increase in positive charge in the nucleus as you go from left-to-right. Each time you go over an element it has one more electron and proton added to the principal energy level, so the nucleus pull increases and it holds the valence electron in tighter.
When looking across a period of the periodic table from left to right when happens to the atomic number and electronegativity?
As you move across a period from left to right in the periodic table, the atomic number of the elements increases by one with each element. Electronegativity also increases across a period from left to right due to the increasing nuclear charge and decreasing atomic radius, which results in stronger pull on electrons.
What is the relationship of atomic radii for each pair of species shown below?
The relationship of atomic radii for each pair of species shown below is that the atomic radius increases as you move down a group on the periodic table and decreases as you move across a period from left to right.
As you move across a period of the periodic table from left to right what happens to the number of protons contained by each element?
The number of protons contained by each element increases by one as you move across a period of the periodic table from left to right. This is because each element in a period has one more proton in its nucleus than the element before it.
What does the sequence in each period represent in relation to electrons?
The sequence in each period represents in relation to electrons is that as you look from left to right on the periodic table, you see a pattern; an increase of the atomic number. The number of electrons equals the number of protons, and the number of protons equals the atomic number.
Why does the element with lowest atomic number have the greatest atomic radii in each period?
Across the period, the total number of shells remain the same. But, atomic number, i.e., no. of protons and electrons goes on increasing. Protons (positively charged) present in the nucleus exert a nuclear charge towards the electrons (negatively charged) present around the nucleus, and pull the shells toward the nucleus. Hence, when no. of protons increases, nuclear charge also increases and hence it pulls the shells with greater force, and shells get closer to the nucleus. Hence, across the period, atomic size, or the radii go on decreasing.
What do notice on the atomic number of elements in a row as one goes to the right of the table?
The atomic number increases from left to right across a period (row). This is because the atomic number is the number of protons in the nuclei of the atoms of each element. No two elements have the same atomic number. It is the protons that define an element.
How do atomic numbers and atomic masses increase in the periodic table?
Atomic numbers increase from left to right across a period on the periodic table. This is because each element in a period has one more proton in its nucleus compared to the element before it. Atomic masses generally increase from left to right as well, but there may be deviations due to isotopes or other factors. Within a group or column, atomic numbers and atomic masses increase from top to bottom as each successive element has more electrons and neutrons than the one above it.
What is the periodic trend for atomic size from top to bottom in a group?
Atomic size generally increases from top to bottom within a group on the periodic table. This is because each successive element has an additional energy level of electrons, leading to increased electron-electron repulsion and an overall increase in atomic size.
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 makes the atomic radius change along a period in the periodic table?
More protons in the nucleus pull the electrons in, making the atomic radius smaller.
