Question | Answer |
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. |