Chemical Bonding — Cumulative exam Answers

Which is the most likely reason why scientists change a model?

Alai is comparing the physical property of two materials. He is hitting each with a hammer to observe what happens. What physical property of the materials is Alai most likely observing?

This chart shows what happens when each object is placed on a balance with a 10 kg weight on the other side.Which statement is best supported by the information in the chart?

This chart shows descriptions of the atoms for four different substances.

Zac releases the air from a balloon. Which statement best describes what will happen to the air that was inside the balloon?

What is 5.27 × 10–4 written in standard form?

A student is working with four different solid substances: sodium (Na), calcium (Ca), copper (Cu), and iodine (I). Which substance is most likely to break easily into many smaller pieces?

Gabriella got a burn on her arm from a chemical spill and rinsed the area thoroughly with water. Which piece of safety equipment would she use next?

Which statement describes one feature of Rutherford’s model of the atom?

Where are the most reactive nonmetal elements found on the periodic table?