An atom Y has atomic number 13 in order to become stable i. what is the proton number and electron number of the atom.
a. Before it looses electrons.
b. After loosing electrons.
ii. Name the type of ion formed by the atom when it looses three electrons.
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What is the primary force that suspension bridges use cables to hold their spans up? a. tension force b. resistance force c. normal force d. elastic force e. applied force

You are given a vector a = 125i and an unknown vector b that is perpendicular to a. the cross-product of these two vectors is a × b = 98k. what is the y-component of vector b?

Two rigid transformations are used to map δhjk to δlmn. the first is a translation of vertex h to vertex l. what is the second transformation? a reflection across the line containing hk a rotation about point h a reflection across the line containing hj a rotation about point k