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Straight up, atomic number identifies the element. And it is determined solely by the number of protons in the nucleus of that atom. The electron count will match the proton count in a neutral atom. Neutron count, and, therefore, Atomic Mass, can vary because there are different isotopes of a given element around. Just as one example, most hydrogen has a single proton for a nucleus, but some hydrogen has a neutron attached to that proton. In even rarer cases, hydrogen can have two neutrons hanging onto that proton. Here's one element, with one set of chemical characteristics, and three different atomic masses. Best to go with atomic number than atomic mass when considering chemical properties.
What else can I help you with?
Is the paint color on a new car a chemical property?
No, the paint color on a new car is not a chemical property. It is a physical property because it can be observed without changing the chemical composition of the paint. Chemical properties relate to how a substance interacts with other substances to form new substances.
Is volume physical or chemical?
Volume is a physical property that allows us to quantify the space that matter occupies. Chemical properties, on the other hand, relate to the behavior of substances at the molecular level.
How do protons and neutrons relate to an elements atomic number?
Protons are positively charged particles found in the nucleus of an atom. The number of protons in the nucleus determines the element's atomic number. Neutrons are neutral particles also found in the nucleus, and together with protons, they determine the atomic mass of the element.
Can you consider hemoglobin molecules have a red color as a chemical property?
Hemoglobin molecules having a red color is not considered a chemical property, but a physical property. Chemical properties involve the way a substance interacts with other substances in chemical reactions, while physical properties relate to observable characteristics like color, density, and melting point.
Is a helium balloon rising to the ceiling a chemical property?
No. This is because it is demonstrating the fact that it is less dense than the air. Density is a physical property. Therefore the helium balloon rising to the ceiling is not a chemical property, and instead a physical property.
How does the atomic mass relate to the atomic number?
These values are similar.
What is the atomic number of helium and how does it relate to its properties?
The atomic number of helium is 2. This number indicates the number of protons in the nucleus of a helium atom. The atomic number of an element determines its chemical properties, such as its reactivity and bonding behavior. Helium's atomic number of 2 means it has a stable configuration, making it a noble gas with low reactivity and high stability.
How does the atomic number relate to the number of protons in an atom?
Atomic Mass (of an isotope) - number of protons (of an isotope) = number of neutrons (of an isotope)
Is density a chemical property of matter?
No, density is a physical property of matter, not a chemical property. Density is a measure of how much mass is contained in a given volume of a substance. Chemical properties relate to the behavior of a substance in chemical reactions.
What is the first theory to relate chemical changes to events at the atomic level?
The first theory to relate chemical changes to events at the atomic level was proposed by John Dalton in the early 19th century. Known as Dalton's atomic theory, it stated that elements are composed of indivisible particles called atoms, and chemical reactions involve the rearrangement of these atoms to form new substances.
How does the approximate atomic mass relate to the mass number?
These values are similar.
What is a chemical property determined by?
Chemical properties are determined by the behavior of a substance in reactions and its ability to form new substances with different chemical compositions. These properties relate to how a substance interacts with other substances, such as its reactivity, flammability, and ability to undergo chemical changes.
Is a pellet of sodium is sliced in two a chemical property or physical property?
Slicing a sodium pellet in two is a physical property because it does not change the chemical composition of the sodium. Chemical properties relate to the substance's ability to undergo chemical reactions, while physical properties pertain to characteristics such as size, shape, and state of matter.
Does the atomic number relate to the number of neutrons?
No, the atomic number relates to the number of protons and electrons. say if the atomic number is 8 and the atomic mass is 17. by looking at the atomic number you can tell there are 8 protons and 8 electrons. but now you want to find the number of neutrons. you see that the atomic mass is 17. so you subtract the atomic number from the atomic mass. which is 17-8= 9. so there are 8protons, 8electrons, and 9 neutrons. hope this helps you.
Is the paint color on a new car a chemical property?
No, the paint color on a new car is not a chemical property. It is a physical property because it can be observed without changing the chemical composition of the paint. Chemical properties relate to how a substance interacts with other substances to form new substances.
How does the existence of isotopes relate to atomic masses not being wholes number?
Mass of isotopes are not integers.
Is volume physical or chemical?
Volume is a physical property that allows us to quantify the space that matter occupies. Chemical properties, on the other hand, relate to the behavior of substances at the molecular level.
