S2 Unit 1 Atomic Structure and Periodic Table / 5 of 16 Your teacher gives you a sample of an unknown element which is sealed in a glass tube at room temperature. At the bottom of the tube
there is a small amount, a few drops at the most, of a red-black filmy liquid, and above it is a red vapor. What is this element likely to be?
(DOK 1)
O A. non-metal
Exhi
O
B. metal
O
C. metalloid
INTL
12:34
Lenovo

What mistake did john needham make that caused him to conclude that spontaneous generation for microorganisms occurred? a. he re-contaminated his boiled broth solutions. b. he destroyed the vital force in the solutions. c. he did not boil his broth solutions, only warmed them. d. he failed to seal his flasks of boiled broth. e. he allowed his assistant to conduct the experiment which he did not monitor closely.