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Atoms of different elements can combine: for example, a carbon (C) atom can combine with two oxygen (O) atoms to form carbon dioxide (CO2) Carbon dioxide is
31 mar 2017 · The tiny particles called atoms are the basic building blocks of all matter Atoms can be combined with other atoms to form molecules
Where do atoms come from? Believe it or not, the atoms on Earth, including the ones in you and everything around you, came from outer space
Isotopes are varieties of atoms having the same number of protons, but different numbers of neutrons We know that all elements have isotopes, either naturally
Two atoms sharing the same number of protons but a different number of neutrons are isotopes of that element For example: • All the isotopes of hydrogen have
and the atom has no electrical charge This is a neutral ion Sometimes, electrons are far from the nucleus and not held very tightly by the protons
that can participate in a chemical change 2 An element consists of only one type of atom, which has a mass that is characteristic of the element and is
All water molecules have the same shape because the bonds between the hydrogen atoms and the oxygen atom are more or less the same angle Single molecules can
Atoms have equal numbers of electrons and protons, i e they are electrically neutral Atomic ions have lost or gained an electron, so they are positively
Molecules are groups of atoms bonded together in the same way that words are While the atoms have different masses and organization for each element,