Which group on the periodic table is characterized as highly reactive elements containing only one valence electron? noble gases halogens alkaline earth metals alkali metals

A 7th grade science class placed three large grade A eggs into beakers and recorded the mass. They then filled one beaker with vinegar, one with corn syrup, and one with distilled water. After 5 days, they recorded the new masses of the eggs.

Do plant cells have cell walls?

Which is an example of the use of activation energy? A. Plugging in an iron B. Playing Basketball C. Holding a match to a paper D. Eating

Determine the number of three egg omelets that can be prepared from 4 dozen eggs

Stomach acid has a pH of about 2. What conclusion can you reach about the pH of an antacid solution that is used to neutralize excess stomach acid?

Detectors in the walls of four containers (A-D) count the number of collisions between gas molecules and the surfaces of the containers. The detectors count 10, 15, 20, and 30 collisions per second for containers A, B, C, and D, respectively.

Oxygen, hydrogen, and water are substances. which of these substances are elements

Water has what type (s) of properties? a. physical onlyB. chemical onlyC. physical and chemical

1. Determine which object will SINK or FLOAT in water. Block #1 (3.2 g/mL) A. Sink Block #2 (0.02 g/mL) B. Float _Block #3 (0.98 g/mL) Block #4 (1.2 g/mL) Block #5 (2.4 g/mL)

The correct symbol for the ion formed by nitrogen is: