Which are older, the atoms in the body of an elderly person or those in the body of a baby? They are the same age, which is appreciably older than the solar system.
Where did the atoms that make up a newborn baby originate? From the mother’s body. In what sense can you truthfully say that you are a part of every person around you? Atoms move from person to person.
In the biological concept, the atoms that make up a newborn baby originate in the bodies of parents i.e. in the body of father and mother of the
Which of the following might best explain the reason why electrons are restricted to certain energy levels in an atom? They behave like restricted waves and are self-reinforcing. The electrons on the atoms repel other electrons on other atoms when they get close.
Helium is the smallest atom. An electron gets added to each element from left to right and in the same shell. More the attraction, less the space.
Does it make sense to say that a textbook is about 99.9 percent empty space? Yes. A textbook like all material things is made up of atoms, which are considered to be 99.9 percent empty space. The atomic masses are average atomic masses.
Rutherford model, also called Rutherford atomic model, nuclear atom, or planetary model of the atom, description of the structure of atoms proposed (1911) by the New Zealand-born physicist Ernest Rutherford.
In 1827, while examining grains of pollen of the plant Clarkia pulchella suspended in water under a microscope, Brown observed minute particles, now known to be amyloplasts (starch organelles) and spherosomes (lipid organelles), ejected from the pollen grains, executing a continuous jittery motion.
Are most of the atoms around us younger or older than the Sun? Most are older than the Sun. Why can’t atoms be seen with a powerful optical microscope? Atoms are much smaller than a wavelength of light.
Which of the following correctly lists the pair of subatomic particles that balance the charge of the atom? If Magnesium(mg) has become an ion with a charge of -4, how did this occur? It gained 4 electrons. Which of the following lists the two particles found together inside the nucleus of an atom?
The lowest energy state an atom can be at is called its ground state. When an electron in an atom has absorbed energy it is said to be in an excited state. An excited atom is unstable and tends to rearrange itself to return to its lowest energy state.
Electron Shells Electrons that are in the first energy level (energy level 1) are closest to the nucleus and will have the lowest energy. Electrons further away from the nucleus will have higher energy. An atom’s electron shell can accommodate 2n2 electrons, where n is the energy level.
Cesium (Cs), tucked in the lower left hand corner of the table, has the largest known atoms. The atomic radius of Cs is given variously as 273.1 pm , 265 pm , 265.5 pm  or 260 pm .
If by “biggest” and “smallest”, you mean mass (which is a measure of how much matter is there), then the smallest is the hydrogen atom with one proton and one electron. Since electrons are about 2000 times less massive than protons (and neutrons), then the mass of an atom is mostly from the protons and neutrons.
As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.