What mass of \text{Al} contains the same number of atoms as 3.0 \text{ g of Pb} ? How do you find the weight one atom? What is the difference between a molecule and an atom? How does the energy in the third shell of an atom compare to the energy of an elect...
Leaves and bark, xylem and phloem, and cambium. What are those made of? Cells, molecules,carbonatoms. But what's an atom made of? Whatismatter, really? Matter is defined as that which 1) has mass and 2) has volume or takes up space. Mass is an intrinsic property whose base SI unit...
Therefore the nucleus of an atom is positively charged. Or, if describing more than one atom, one would say that the nuclei (plural) of the atoms are positively charged. The nucleus is tiny compared with the total volume of the atom. That is, it occupies a very small space compared wi...
What are the parts of an atom?Most atoms have three different subatomic particles inside them: protons, neutrons, and electrons. The protons and neutrons are packed together into the center of the atom (which is called the nucleus) and the electrons, which are very much smaller, whizz around...
• The formula for calculating mass is Mass = Density x Volume. You can also find an object’s inertial and gravitational mass. Mass is everywhere you look. Everything that is made up of something has mass. Even the oxygen we breathe has mass! Understanding mass gives you a greater un...
The element Sc has HCP packing with a hexagonal unit cell. The density of Sc is 3000 kg/m3. Calculate the volume (L) of the unit cell of Sc. Sc molar mass = 44.956. It is HCP, so it has 2 atoms/unit c Pol...
exothermic and spontaneous reaction. In the chemical equilibrium between ATP and ADP in an aqueous solution, ATP is eventually almost completely converted into ADP. Before reaching equilibrium, the Gibbs free energy change of the system is negative, indicating that the system can perform non-volume ...
What is a Unit Cell? - The unit cell must construct the Bravais lattice by repeating itself in space. However, nothing is said about the number of points that must be contained within the unit cell. Lithium metal crystallizes in a body centered cubic cry
Semiconductor materials include – Silicon, antimony, arsenic, boron, carbon, germanium, gallium arsenide, selenium, silicon carbide, sulfur, tellurium, oxides of most metals.What is Superconductor?Superconductor is an element, inter-metallic alloy, or a compound that conducts electricity without ...
In unconfined gaseous matter, particles are spread out indefinitely since they have a lot of space between them. This space is also why atoms in gases have large vibrations, and particles have high kinetic energy. Gases can also be confined, in which case they adjust to the volume and shape...