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Q: Does the atomic mass decrease as you move down a group?
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What do you predict the trend in atomic mass will be going down a group?

The atomic mass increases down a group.


What properties increase down the periodic table?

Atomic Mass


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 happens to the atomic mass as you go from down a group in the periodic table and why?

Atomic mass gets bigger when it goes down since the protons are inceasing.


What happens to the group 1 elements as you go down the table?

As you go down group 1, the atomic number and atomic mass increase. Electronegtivity decreases and atomic radius increases.


What property increases going down a group in periodic table?

Atomic size, number of shells (or energy levels) and electropositivity increases down a group on the periodic table.


Towards the bottom of the periodic table does the atomic mass increase or decrease?

Towards the bottom, atomic mass increases. Atomic number also increases.


Why alkali metal density increase going down the group?

Atomic-volume of alkali metals increases down the group ,But increase in mass dominates over increase in volume ,since density=(mass)/(volume) ,density increases down the group


What change in atomic number occurs when a nucleus emits an alpha particles?

An alpha particle has 2 protons and 2 neutrons. This would make the atomic number decrease by 2 and the Atomic Mass will decrease by 4.


How do the sizes of atoms vary within a group (family)and explain why?

The atomic radius increase down in a group; the cause is the lower attraction from the nucleus atoms with increased bigger atomic mass.


Why does the density of group 2 metals increase?

The density of group 2 metals increases as you go up the group. This is because atomic radius decreases as you go up the group. Density is mass / volume and the ratio of mass to volume of atoms of the elements goes up with the decrease in radius.


What do all elements in a group have?

Atomic mass