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science exam review

section 3: atoms and periodic table.

An element that is malleable, ductile, has luster, and is a good conductor of heat and electricity is called what? metal
A row of elements whose properties change gradually and predictably is also known as what? period
A column of elements that have similar physical or chemical properties is also known as what? group
The most chemically inactive group of elements (very stable) are called_______ nobel gases
Elements that are gases or brittle solids and poor conductors of heat and electricity are called what? non metals
Which element has the fewest number of protons? helium
Which element has an average atomic mass of 12? carbon
Which element's nucleus contains 11 protons? sodium
list and describe the 3 parts of an atom Proton- found in nucleus, positive charge. neutron-found in nucleus, neutral charge. electron-found in electron cloud, negative charge.
what are some properties of a nonmetal? brittle solids, gases, poor conductors of heat and electricity.
Which element has similar properties to boron? aluminum
how are elements on the periodic table arranged? in order by their atomic numbers.
based on partial periodic table above, what elements are metals (remember what side metals are on)? lithium, berylium, aluminum, sodium, magnesium, potassium, calcium.
what is the atomic mass of an element equal to? the number of protons and neutrons.
number 47 can not be typed here. number 47 cannot be typed here.
an atom of nickel has an atomic # of 28. it has an atomic mass of 59. tell how many protons, neutrons, and electrons. 28 protons, 28 neutrons, 31 electrons.
Created by: student_trent