Element

Name

Symbol

Mass

Number

Atomic

Number

Number of

Protons

Number of

Neutrons

Number of

Electrons

Lithium

Carbon

Chlorine

Silver

Lead

Calcium

Tantalum

Radium

Samarium

Uranium

Americium

Lawrencium

How many molecules are in 128g of H2O?

A student notices dark clouds in the sky and that the playground is wet the student reasons that it rained which scientific skill describes the students reasoning A. classifying B. observing C. inferring D. predicting

How does the density of oceanic crust differ from that of continental crust? why is this difference important

Which elements have the most similar chemical properties? a. Be and Mg b. Ca and Br c. Cl and Ar d. Na and P

The gasification of coal is a method of producing methane by the following reaction. C (s) + 2H2 (g) → CH4 (g) ∆H=?

Why is water (H2O) considered the "universal solvent"?

Which notations represent hydrogen isotopes?

Which of the following statements is true? Question 5 options: Chemical reaction rates vary with the conditions of the reaction, but nuclear decay rates do not.

2 human activities that contribute to runoff into water systems

Which of the following is an example of geographic isolation? A. a population of salmon dies out because they cannot find food. B. a zebra with a long mane moves into a population of zebras with short manes. C.