Whenever an atom contains excess negative charge, it is called a negative ion.This means that the atom picked up negative charges from another atom. The atom that lost the electrons becomes a ...
A star is estimated to have a mass of 2 3 1036 kg. Assuming it; to be a sphere of average radius 7.0 3 105 km, calculate the. average density of the star in units of grams per cubic. centimeter. A rectangular block has dimensions 2.9 cm 3 3.5 cm 3; 10.0 cm. The mass of the block is 615.0 g. What are the volume. and density of the block?
When assigning oxidation numbers for molecules use the following equation: For instance take HBrO 2. We know that O has an oxidation number of -2 from Rule 7 and hydrogen is H (I) from Rule 6. The total charge on HBrO 2 is zero. If we use the equation above to solve for the oxidation number of Br we get the following result.
Any influence (PUSH OR PULL) that gives energy to an object, sometimes causing a change in the motion of the object. We use forces in our lives every day . . . When you kick a ball, your foot makes the ball move by imparting a force on the ball. We recognize forces that occur when one object touches ...