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herber physic17 atom
Question | Answer |
---|---|
the smallest particle of an element that can be identified with that element. Consists of protons and neutrons in a nucleus surrounded bt electrons | atoms |
substance made of only one kind of atom | element |
the perpetual random movement of microsopic particles suspended in fluid medium | brownian motion |
the smallest particle of a substance consisting of two or more atoms of the same or different element bonded together | molecule |
a chemical substance made of atoms of two or more different elements combined in a food proportion | compound |
a description that uses numbers and symbols of element to describe the proportions of elements in compound or reaction | chemical formula |
the positively charged center of an atom, which contains protons and neutrons and has almost all the mass of the entire atom but only a tiny fraction of the volume | nucleus |
the pricipal building block o the nuecleus | nucleons |
an electrically neutral paricles found in the nucleus of an atom | neutrons |
the positively charged particle that is one of the two kinds of particles found in the nucleus of an atom | protons |
a form of am element having a particular number of neutrons in the nuclei of its atom. | isotopes |
number of protns in the nucleus of an atom | atomic number |
atom with a net electric charge, which is due to the loss or gain of electron | ion |
a model in which the electrons of an atom are pictured as grouped in concentric shells around the nucleus | shell model of the atom |
the chart that list element by atomic number and electron arrangement | periodic table |
fourth phase of matter, in addition to solid, liquid, and gas. In the plasma phase which exists mainly at high temperture, matter consist of positively charged ions and free electrons | plasma |