About 112
Scientists have identified 118 elements, each made up of unique atoms with different numbers of protons in their nucleus. These elements combine in various ways to form all the matter in the universe.
I suppose you mean "kinds of atoms". The answer depends on whether you mean "element" or "isotope". Two isotopes of the same element have the same number of protons, but a different number of neutrons. You may consider it a "sub-type". Elements: More than 100. Isotopes: More than 3000.
109 on A+
Gaps in the periodic table allowed scientists to predict the properties of undiscovered elements based on the patterns observed in existing elements. This guided the search for new elements with specific characteristics, leading to the discovery of elements like gallium, scandium, and germanium. The periodic table's structure and trends continue to assist scientists in identifying and characterizing new elements.
Scientists suggest Mendeleev left gaps in the periodic table because Mendeleev knew the elements existed; however, was unable to prove it.
Scientists have identified 118 different elements, with 94 occurring naturally on Earth and the rest being synthesized in laboratories. Each element is unique due to its specific number of protons in the nucleus, giving it distinct chemical properties.
Scientists have identified 118 different elements on the periodic table. Each element is uniquely defined by the number of protons in its nucleus.
Scientists have identified 118 elements, each made up of unique atoms with different numbers of protons in their nucleus. These elements combine in various ways to form all the matter in the universe.
Elements are identified based on the number of protons in their atoms, which is known as the atomic number. Each element has a unique atomic number, allowing scientists to distinguish between different elements.
more than 20
a lot probaly over 1000 elements
Surprisingly, most are.
Scientists have discovered just over 118 different elements with unique properties. These elements have diverse characteristics that make them essential building blocks of the universe. Each element is identified by its atomic number, which determines its placement in the periodic table.
the total number of elemetns humanly known is 118
Scientists have identified and named around 1.7 million species of organisms, but it is estimated that there may be anywhere from 8.7 million to over 1 trillion total species on Earth.
250,000
Elements are identified based on their absorption spectra. Every element absorbs a unique set of frequencies when light passes through it. Scientists can determine which elements are present based on which portions of the star's light are absorbed.