Imagine you are given a mystery element. it is , however a discovered and known element . you may perform a maximum of two observations or tests to determine its identity. time and money is critical. getting by with a single test is preferable. pick your two tests , number them as 1 and 2 and justify why you think these two will certainly be enough ( and why the first could be enough by itself). the available tests are classification into metal , not metal , or metalliod, count of valence electrons , count of electron shells , atomic radius , electronegativity , first ionization energy , melting point , and boiling point

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

Plz me ! 1 which of earths spheres contains most of its mass? a atmosphere b hydrosphere c geosphere* d biosphere 2 erosion and weathering are examples of which types of forces? a constructive forces b destructive forces* c gravitational forces d inertia-related forces 3 which of the following statements about earths atmosphere is true? a earths atmosphere contains 78% water vapor which is essentail to life b earths atmosphere contains 21% oxygen c earths atmosphere contains carbon dioxide which all life forms require d earths atmosphere allows radiation from the sun to pass through it and warm earths surface* 4 the strenght of the force of gravity between two objects is determined by which of the following factors? select all that apply a the messes of the objects* b the distance between the objects* c the volumes of the objects d the surface area of the objects 5 earth and moon are kept in there respective orbits due to the influence of a inertia b gravity c gravity and inertia* d neither gravity or inertia if you answer all questions right i will give