Which terms are used to identify pure substances?

(1) an element and a mixture

(2) an element and a compound

(3) a solution and a mixture

(4) a solution and a compound

A neutral atom whose electron configuration is 1s² 2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶ is a. Highly reactive b. A noble gas c. A positively charged ion d. A transition metal e. A lanthanide element

A car slows down as it approaches a traffic light. Which best describes its acceleration? Complete Negative Positive Zero

Number the elements sodium, magnesium, and potassium in the predicted order from the largest to the smallest

What is co2 the element

A main function of a plant's seed is to

Spell out the full name of the compound Cl2O7

True or False. When covalent bonds are formed between atoms having different electronegativities, the electrons tend to spend less time at the atom with the greater electronegativity. Such chemical bonds are called polar covalent bonds.

How many protons are in an element

Which of the following is an example of oxidation? A. Charcoal is placed on a grill and lighting fluid poured over it. B. A car gets rusty over the course of a few years. C.

The metric unit of force is the A. gram. B. kilogram. C. nanometer. D. newton.