An element has 43 protons and 50 neutrons. What is the atomic number of the element? How many neutrons does element x have if it's atomic number is 42 and it's mass number is 154? A certain atom has an atomic mass of 19 and atomic number of 9? How many protons does it have?
Give the symbol for each element: (a) helium (b) silver (c) arsenicConsider the element magnesium. Which statement is true? (a) It is in Group 5A. (b) It is a noble gas. (c) A magnesium atom has electrons in nine shells. (d) It is an alkaline earth metal.Which pair of elem...
To complicate things a bit more, we sometimes find atoms of a chemical element that are a bit different to what we expect. Take carbon, for example. The ordinary carbon we find in the world around us is sometimes called carbon-12. It has six protons, six electrons, and six neutrons, ...
This ratcheting up of problem-solving capacity and technology is possible because human brains are learning-versatile compared to beaver brains. A major element of human learning before the establishment of cities was that our brains had the capacity, much more so than beavers, to engage in didact...
One mole is a scientific form of measurement in chemistry. Elements need to have equal amounts of protons and electrons to be stable, but they can vary in the amount of neutrons they contain. The amount of protons in the element is theatomic number. ...
It's not that simple though. An atom's properties can change considerably based on how many of each particle it has. If you change the number of protons, you wind up with a different element altogether. If you alter the number of neutrons in an atom, you wind up with an isotope. For...
Another way for the energy in mass to be released is for atoms within that mass to come apart. This also occurs naturally in nature. For example, uranium is radioactive element. That means it is falling apart. There are 92 protons in its nucleus. All of them are positively charged and ...
An element is an isotope made of the number of neutrons it has. A compound is a substance made of two or more different elements (a mixture). 2.Whatis the periodic table? A periodic table is where the chemical elements are organized based on their atomic number (number of protons in t...
“Imagine every element on the periodic table is highly charged and radioactive, and traveling at the speed of light,” Donoviel said. These particles consist of higher-energy protons and heavy ion nuclei. Because of their energy and speed, they can penetrate “far, fast and hard,” she ...
What element is fluorine? What is the chemical element fluorine? How many neutrons does fluorine have? What is the mass number for fluorine? What is an isotope in geochemistry? Which isotope of lithium has 3 neutrons? How many protons does fluorine have?