Which of the following statements is/are correct? 1. atoms are the smallest particles of an element that retain the element's chemical properties. 2. substances composed of only one type of atom are classified as elements. 3. of the 118 known elements, only 48 occur naturally.

A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.