Subatomic particles can usually pass undeflected through an atom because the volume of an atom is composed of

(1) an uncharged nucleus

(2) largely empty space

(3) neutrons

(4) protons

An atom nucleus contains 28 protons and the atom has a mass number of 60. how many neutrons does this atom contain? how many electrons? what is the identity of the atom?

What is the type of bond that forms between water molecules

If a rectangle block measures 118.87 cm by 29.87cm by 2.30cm and has a mass of 4.9957kg what is the density of the material in g/ml

What are three characteristics of a chemical reaction

Copper (Cu) is often used for electrical wiring and cooking pans. However, iron (Fe) is much more common on Earth than copper. Why might copper be used instead of iron, if iron is easier to obtain?

How many protons does one atom of sulfur have

Which shows the electron configuration for zinc (Zn) ? [Kr]5s24d10 [Kr]5s24d6 [Ar]4s23d9 [Ar]4s23d10

What is the oxidation number of chromium in the ionic compound ammonium dichromate (nh4) 2cr2o7?

Draw an ecosystem with 10 biotic and 5 abiotic factor

Which organism is responsible for cleanup in this ecosystem? coyote vulture prairie dog grasshopper or prairie grass