What are the three main classifications of the elements?

What are the three main classifications of the elements?

Elements can be classified as metals, metalloids, and nonmetals, or as a main-group elements, transition metals, and inner transition metals. Groups are numbered 1–18 from left to right.

What makes elements different from another?

Normally, the number of electrons is equal to the number of protons, which makes atoms electrically neutral. The number of protons in an atom is the defining feature of an atom. It’s what makes one element different from another. The number of protons in an atom is called its atomic number.

How is one element distinguished from another?

The number of protons determines an element’s atomic number and is used to distinguish one element from another. The number of neutrons is variable, resulting in isotopes, which are different forms of the same atom that vary only in the number of neutrons they possess.

What is special about elements?

In chemistry, an element is a pure substance consisting only of atoms that all have the same numbers of protons in their atomic nuclei. Unlike chemical compounds, chemical elements cannot be broken down into simpler substances by chemical means.

What is AR in the periodic table?

Argon (Ar), chemical element, inert gas of Group 18 (noble gases) of the periodic table, terrestrially the most abundant and industrially the most frequently used of the noble gases.

Which came first krypton or kryptonite?

Technically, from the planet which exploded and from where Superman was born, the planet Krypton. Kryptonite first appeared on a radio broadcast in 1943 and made its first non-green appearance in 1949’s Superman #61, we would not actually see the signature GREEN Kryptonite until 1951 in Action Comics #161.

What is black kryptonite?

A Black Kryptonite is a form of refined Kryptonite that can separate the personalities of a single being into two separate beings. This Kryptonite is created by heating Green Kryptonite to extremely high temperatures.

Is Kryptonite good or bad for Superman?

Green kryptonite weakens Superman and other Kryptonians. It can and will kill them with long-term exposure. Kryptonians under green kryptonite’s effects experience severe muscular weakness, usually to the point of collapse, and excruciating pain, with both conditions progressively intensifying.

Can Superman recover from gold kryptonite?

Exposure to Gold Kryptonite may not destroy Superman, but it will strip away his superpowers forever. The Gold substance first appeared in the pages of Adventure Comics #299 (1962).

Can Kryptonite kill Superman Prime?

Kryptonite Immunity: Krypton of Earth-Prime’s universe—unlike other versions of the planet—was swallowed up by its sun Rao, rather than destroyed in an explosion that might have created kryptonite, so there is no known kryptonite that can affect Kal-El Prime.