Which of the statements about elements is true?
• The atoms of all elements have different masses and different volume.
Scientists have identified a little less than 100 elements.
• The atoms of all elements have the same mass and volume.
• The atoms of all elements have different masses but the same volume.
• The atoms of all elements have different masses but the same volume.
The correct statement about elements is:
• The atoms of all elements have different masses but the same volume.
The correct statement is: "Scientists have identified a little less than 100 elements."
To verify this information, you can access various reliable sources such as textbooks, scientific articles, or reputable websites focusing on chemistry. These sources provide extensive information about the periodic table, which lists all known elements.
One such source is the International Union of Pure and Applied Chemistry (IUPAC), which is responsible for validating the discovery of new elements and maintaining the periodic table. Their website (www.iupac.org) provides reliable information about the number of currently known elements.
By exploring these sources, you will learn that, as of now, around 118 elements have been identified by scientists. However, the precise number may change over time as new discoveries are made.
Regarding the other statement options:
- "The atoms of all elements have different masses and different volume" is incorrect. Elements consist of atoms, and while their masses might differ, their volumes are not necessarily distinct. The volume of an atom depends on its electron cloud and atomic structure, which can vary, but it is not a defining characteristic of an element.
- "The atoms of all elements have the same mass and volume" is also incorrect. Elements have different atomic masses and volumes due to variations in the number of protons, neutrons, and electrons they possess.
- "The atoms of all elements have different masses but the same volume" is incorrect for the same reasons mentioned above.
Remember, it's important to consult reliable sources to confirm information and stay up-to-date with scientific knowledge.