What determines whether or not two atoms will bond to form a molecule? What makes up most of the volume of an atom? What determines an element's electronegativity? What makes one atom different from another atom? How can a charged atom (an ion) attract a neutral atom?
All atoms are made from the same bits, which are called subatomic particles ("sub" means smaller than and these are particles smaller than atoms). So if you chopped up an atom of iron, and put the bits into a pile, and then chopped up an atom of gold, and put those bits into a ...
What is an atom? Explain. Question:What is an atom? Explain. What is Matter?Anything that has mass and takes up space is considered to be matter. It is made up of atoms and molecules, which interact with one another through a variety of interactions to form the physical elements that co...
The most common example of an atomic reaction is the hydrogen fusion reaction that occurs on the sun. The immense pressure inside the sun -- and also inside other stars – forces atoms of hydrogen to fuse together (hencefusion) to form atoms of helium. During this process, some mass is c...
This collision causes the atoms to light up, to glow… different types of atoms glowing different colors. 这种碰撞导致原子发光,不同类型的原子发出不同的颜色。 And this is what’s happening when we’re seeing an aurora. 这就是我们看到极光时正在发生的事情。
What is dark matter made of? Despite decades of study, scientists still don't know exactly what dark matter is made of. They do know it's not made of ordinary atoms — the same kind of matter that makes up stars, planets, and people. That kind of matter is called "baryonic," and ...
835 times more massive than an electron. Atoms always have an equal number of protons and electrons, and the number of protons and neutrons is usually the same as well. Adding a proton to an atom makes a new element, while adding a neutron makes an isotope, or heavier version, of that...
The atomic mass of aluminium is given to be 27 u. This means that 1 mole of aluminium atoms has a mass of 27 grams. Now, 1 mole of aluminium atoms = 27 g So, 4 moles of aluminium atoms = 27 xx 4 g = 108 g Thus, the mass of 4 mole
(lower case), the "acceleration due to gravity." This is the famous legend that has Galileo dropping objects from the Leaning Tower of Pisa. It tells us that the gravitational force is proportional to the mass of the object. This is such an important discovery that physicists call it a [...
Fusion occurs when two light atoms bond together, or fuse, to make a heavier one. The total mass of the new atom is less than that of the two that formed it; the "missing" mass is given off as energy, as described byAlbert Einstein'sfamous "E=mc^2" equation. ...