Question

timed test. this test has a time limit of 1 hour. this test will save and submit automatically. warnings appear when half the time, 5 minutes, 1 minute, and 30 seconds. multiple attempts not allowed. this test can only be taken once. force completion once started, this test must be completed in one sitting. do not leave the test. this test does not allow backtracking. changes to the answer after submission are not allowed. your answers are saved automatically. remaining time: 47 minutes, 51 seconds. question completion status: question numbers from 1 - 44 shown moving to the next question prevents changes to this answer. question 19 because carbon has four electrons in its outer energy level a. these atoms are naturally chemically stable b. it cannot react with anything other than organic molecules c. it can react with up to four other atoms to form covalent bonds d. bacteriophage

Explanation:

Carbon has 4 valence electrons. To achieve a stable octet (8 - electron outer - shell), it can share electrons with up to four other atoms to form covalent bonds. Option a is incorrect as carbon is not naturally chemically stable with 4 valence electrons. Option b is wrong because carbon can react with many substances, not just organic molecules. Option d is unrelated as bacteriophage is a virus that infects bacteria.

Answer:

C. it can react with up to four other atoms to form covalent bonds