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Name the family that contains Na Name the family that contains Ba Name the family that contains Br Name the family that contains Ar Give an example of a metalloid. Only write its symbol. Give an example of a transition metal in the 4 th period. Only write its symbol. Select all properties of nonmetals that apply. Have high lustre Brittle Poor conductors Colorful Ductile Main elements in semiconductor industry Good conductors Malleable Select all the properties of metals that apply. Colorful Poor conductors Have high lustre Ductile Are the main elements in semiconductor industry Brittle Good conductors Malleable Ernest Rutherford discovered electrons. True False Electrons and protons contribute equally to atom's mass. True False Neutrons and electrons weight approximately the same. True False Valence shell is the first shell of the atom to get filled. True False Specify the charge on the atom below. Include both the sign and the number. For example: +1;3; etc. Na Specify the charge on the atom below. Include both the sign and the number. For example: +1;3; etc. Ca Specify the charge on the atom below. Include both the sign and the number. For example: +1;3; etc. S Specify the charge on the atom below. Include both the sign and the number. For example: +1;3; etc. Mg Specify the charge on the atom below. Include both the sign and the number. For example: +1;3; etc. Mg For Ar-37 specify: Element's name: Atomic number: Mass number: Number of protons: Number of neutrons: Number of electrons Write the symbol for the element with atomic mass 74.9 a.m.u. Write the symbol for the element in the 13 th family and 4 th period. Write the symbol for the noble gas in the 1 st period. Write the symbol for the element with the electron configuration ending in 4s2. Write the symbol for the alkaline earth element in the 5 th period Write the symbol for the element with atomic number 24