Flashcards
Chapter 1 - 3 Book 4
Flashcards do conjunto (12)
- 1How is an element concentration expressed?mostly parts per billion (ppb)
- 2What is a nucleus?the densely packed inner part of an atom?
- 3What is and where are protons, neutrons, electrons?Protons (+) and Neutrons (neutral)
are in the nucleus surrounded by one or more electrons (-) - 4What is the atomic number and when is an atom neutral?atomic number, Z, is the number of protons and determines the element.
A neutral atom contains an equal amount of electrons and protons - 5What is the relative atomic mass of an atomRAM, A_r = number of protons, Z + number of neutons, N
- 6What is an isotope?An Atom which is containing one or more neutrons in their nucleus
- 7What is the actual mass and relative mass of a proton and neutron?proton and neutron each
act. mass = 1.7 x 10^-27
relative mass = 1 - 8What are ions?Ions are atoms with an inequality of electrons
- 9What if an atom has more than electrons than protons and what if less?Ion with more e^- than p^+ is an anion
Ion with less e^- than p^+ is a cation - 10What are molecules and how there holding together?Molecules are two or more atoms hold together by an intramolecular force, also called chemical bond
- 11Explain the intramolecular bonds?covalent bond is when two atoms of similar properties share an electron
Ionic bond is between cation and anion - 12What is relative molecular mass?RRM, M_r = the sum of A_r in one molecule.
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- FlashCards sobre Chapter 1 - 3 Book 4, criado por Hannes Django em 01-05-2016.
- Criado por
- Hannes Django
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