As the first five elements in Group 15 are

considered in order of increasing atomic number,

first ionization energy

(1) decreases

(2) increases

(3) decreases, then increases

(4) increases, then decreases

Describe the sources of water pollution in hydrological cycle.

What volume of water should be used to dissolve 19.6 g of LiF to create a 0.320 M solution?

Which of these statements about how the percent ionization of a weak acid depends on acid concentration is true? (a) Line A is most accurate because Ka does not depend on concentration.

You r wrong it is what he said that is write

Which of the following statements about atoms is NOT true? Atoms make up every material. Atoms are the smallest particles that are characteristic of a given element. Atoms are too small to be seen even with a microscope.

Molar mass of 34.00 g/mol molecular formula

In CO which element holds electron more tightly

Copper is composed of two naturally occurring isotopes: Cu-63 (69.170%) and Cu-65. The ratio of the masses of the two isotopes is 1.0318. What is the mass of Cu-63?

The measurement describes the area of solid object a. 25mm b. 23c c. 25cm2 d. 25cm3

The face-centered gold crystal has an edge length of 407 pm. based on the unit cell, calculate the density of gold.