Which of the following elements has the largest atoms?

Cesium (Cs), tucked in the lower left hand corner of the table, has the largest known atoms.

Which element has the largest atoms in Period 4?

For Period 3, the Group1 Alkali Metal (potassium, lowest Z) has the largest atomic radius and the Group 7/17 Halogens & Group 0/18 Noble Gas (bromine & krypton, highest Z’s) have the smallest atomic radii (there is some uncertainty in the noble gas radii).
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Which of the following atoms of elements has the largest atomic radius?

So Cesium has the largest atomic radius among the given elements.

What is the smallest element?

Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.

Which atom is the smallest?

Consequently, the smallest atom is helium with a radius of 32 pm, while one of the largest is caesium at 225 pm.

Why is atomic radius of K greater than Br?

Since potassium is located at the start of period 3, and bromine at the end of the same period, potassium will have a larger atomic radius than bromine, and thus the largest atomic radius of the four given atoms.

Which one has the largest atomic radius?

Explanation: Francium has the largest, Helium has the lowest. Atomic radius increases as you go to the left and downward due to the attraction of electrons and the nucleus in an atom.

What atom has the largest atomic radius in Group 18?

Thus radon has largest atomic radius.

What is the lightest element on earth?

Hydrogen is the lightest element. Dihydrogen, H2, is a colorless, odorless, tasteless gas.

Who is the heaviest element?

The heaviest element found in any appreciable amount in nature is uranium, atomic number 92. (The atomic number refers to the number of protons in an atom’s nucleus.) Beyond that, scientists must create new elements in accelerators, usually by smashing a beam of light atoms into a target of heavy atoms.

What is the element symbol of gold?

Au

What is the center of an atom called?

Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).

What makes up most of an atom?

They’re typically made up of three main parts: protons, neutrons and electrons. Think of the protons and neutrons as together forming a “sun”, or nucleus, at the centre of the system. The electrons orbit this nucleus, like planets. If atoms are impossibly small, these subatomic particles are even more so.

What is the smallest and lightest atom?

Protium, the ordinary isotope of hydrogen having one proton in its nucleus and an electron revolving around it, is the smallest and lightest of all atoms. It does not have a neutron in its nucleus like a few other isotopes of hydrogen do. Thus its mass is merely 1.008123 amu (atomic mass unit).