Table of Contents

- 1 What is the relationship between atomic number and density?
- 2 What is the relationship direct inverse or none between mass and density?
- 3 Why does density increase when atomic number increases?
- 4 What is direct and inverse relationship?
- 5 Is the relationship between atomic number and atomic radius within a group direct or inverse?
- 6 What is the relationship between number density and mass per atom?
- 7 What is the difference between atomic mass and atomic number?

## What is the relationship between atomic number and density?

There is no explicit relation that says the higher the atomic number, the greater the density.

**Is there a correlation between the atomic mass and the density?**

Explanation: Atoms with a lower atomic mass have a greater density than the atom with the higher atomic weight because the atoms are tightly packed together. The volume of a material can change with temperature and pressure. This can also modify the density of the material.

### What is the relationship direct inverse or none between mass and density?

Density and Volume are inversely proportional to each other. Mass and volume are not the same. Thus, from the above formula, we can say that, For a fixed mass, When density increases, volume decreases.

**What is the relationship between period number and density?**

A relationship between the period of a pulsating variable and its mean density. The lower the density, the longer the period.

#### Why does density increase when atomic number increases?

As we down in a group then its size increases and also volume of the atom increases as the number of electrons and protons increases. But if increase in volume is greater than that of increase in mass then density will decrease in that case. So, on moving top to down in a group, the atomic density generally increases.

**What is the relationship between atomic radius and atomic number?**

Atomic Radii as a Function of Atomic Number Exercise 2 Across a given row of the periodic table, the general trend is that the radii of the atoms decrease as their atomic numbers . Such a relationship between atomic number and atomic radius is a direct correlation. an inverse correlation.

## What is direct and inverse relationship?

Direct Relationship: This is where two variables do the same thing. If one increases, the other increases. If one decreases, the other decreases. Inverse Relationship: This is where two variables do the opposite thing. If one increases, the other decreases.

**Why does density increase down a group on the periodic table?**

When we move down the group, there is a constant increase in atomic and ionic radii and also the mass of the atoms increases due to increased no. Hence the increased size or volume is compansated more by mass i.e, the increase of mass becomes greater and in overall the density increases down the group.

### Is the relationship between atomic number and atomic radius within a group direct or inverse?

direct correlation

Exercise 3 Within a given group (column) of the periodic table, the general trend is that the radii of the atoms increase as their atomic numbers . Such a relationship between atomic number and atomic radius is a direct correlation.

**Is atomic radius and atomic size the same?**

What is Atomic Size? Atomic size is the distance between the centre of the nucleus of an atom and its outermost shell. In basic chemistry, the atomic radius is defined as the shortest distance between the atom’s nuclei and the outermost shell of the atom.

#### What is the relationship between number density and mass per atom?

While the mass per atom, $mu$, goes up linearly (very roughly speaking) as you go up in atomic number, the number density does notgo up linearly. This is because interactions between the actual atoms cause them to cluster closer together, so you get a higher value of $n$ in the equation above for some atoms, but a much lower one for others.

**Why do noble gases have a low density?**

For example, the noble gasses all have low density because they’re gasses. They’re gasses because they don’t combine chemically. They don’t combine chemically because all their atomic orbitals are already filled. And their atomic orbitals are filled because they have just the “right” number of electrons.

## What is the difference between atomic mass and atomic number?

The atomic mass is the number of protons and neutrons added together. As elements have isotopes having different numbers of neutrons, the periodic table gives an average mass. The atomic number is simply the number of protons, which is a constant for each element.

**What is the relationship between atomic mass and boiling point?**

The table starts with the lowest atomic numbers at the top left and has the highest at the bottom right. Atomic masses increase as atomic numbers do, so the two are strongly linked. As you progress downwards in the periodic table along a given column, the atomic mass tends to increase along with the boiling point.