science Questions & Answers
groups - ANSWERSthe columns (up/down) on the periodic table
periods - ANSWERSthe rows (left/right) on the periodic table
Mendeleev - ANSWERSorganized first periodic table by atomic mass
Moseley - ANSWERSchanged how periodic table was organized; made it ordered by
atomic number
Parts of the element key - ANSWERSatomic number, element abbreviation, element
name, atomic mass
What does the atomic number tell us? - ANSWERSnumber of electrons or protons
How do we find the number of neutrons? - ANSWERSAtomic mass minus atomic
number
synthetic element - ANSWERSmade in a lab
On the Periodic Table, what group shows the alkaline earth metals? - ANSWERSGroup
2
On the Periodic Table, what color are the Transition Metals? - ANSWERSyellow
Name the alkali metals (see Periodic Table). - ANSWERSLi, Na, K, Rb, Cs, Fr
Sodium (Na) and Chlorine (Cl) are both reactive elements. Is each element safe or
unsafe? - ANSWERSunsafe
How can Sodium and Chloride become safe? - ANSWERSWhen they bond together,
they become sodium chloride; they have formed a compound (table salt)