Element X has five valence electrons, element Y has one valence electron, and element Z has five valence electrons. Which two of these elements are most likely to have similar properties? Explain your answer

Which statements describe advantages of models? Check all that apply. Models make it possible to easily notice patterns. Models can be used to communicate and test design ideas. Models allow scientists to predict relationships.

What do magnets and subatomic particles have in common?

The specific heat of a material is the amount of energy required A. to induce a phase change in the material. B. to bring the material to 0°C. C. to move it with a force of 1 N over a distance of 1 m. D. to change 1 g of the material by 1°C or 1 K.

An atom of carbon forms covalent bonds with two atoms of oxygen to form carbon dioxide how are the valence electrons of these atoms rearranged to form the bonds

The atomic radius refers to the distance from the nucleus of an atom to A. It's proton cloud B. It's electron cloud C. It's neutron cluster D. The nucleus of another atom

Which compounds are ionic and which are covalent? • N2 • SiO2 • CaCl2 • CCl4 • AlCl 3 • LiBr

The noble-gas notation for tin (Sn) will contain the symbol

What does the period number on the periodic table correspond to?

Calculate the mass defectin amu for the formation of phosphorus-31. The mass of aphosphorus-31 nucleus is 30.973765 amu. The masses of a proton anda neutron are 1.00728 and 1.00866 amu, respectively.

Phenol red is a ph indicator routinely used to monitor the ph of solutions in laboratories. It is reddish-orange in neutral solutions, yellow in acidic solutions, and magenta in basic solutions.