{{asɛmtiNe Ɔkyerɛwfo}} | Nhomakorabea | Nneɛma a ɛma wotumi yɛ ade

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A(n) is the smallest piece of an element that still represents that element.

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In the nucleus are , which are atomic particles with a positive charge.

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James Chadwick discovered the , a particle in the nucleus with neutral/zero charge.

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The atomic model by Neils Bohr proposed that move in circular orbits, or energy levels around the nucleus.

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In the modern atomic model, electrons form a(n) which is an area around the nucleus in which an electron is likely to be located.

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The atomic number is the number of in one atom of an element.

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The mass number is the total number of and in one atom of an element.

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In a neutral atom, the number of must equal the number of .

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-- are atoms of the same element that have different numbers of neutrons.

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Around 1868, Russian chemist created the to help classify the known elements by their physical and chemical properties.

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In the periodic table, a column is called a and a row is called a .

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Elements in the same have similar chemical properties.

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Most elements in the PT are , which have a shiny luster and are good conductors.

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-- are on the right side of the PT; which have properties opposite of metals.-

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Between the metals and nonmetals are the , which have properties of both.

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Even though the atom is made of charged particles, it is still neutral. Explain why.

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A

E

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