Q: How does the number of protons compare to the number of electrons in an electrically neutral atom? Choices: - they are half - they are double - they are triple - they are equal A:
they are equal

(Question)
Q: Surface tension comes from the fact that particles at the surface of a liquid do not experience interactions from all directions which leads to what on the surface? Choices: - degradation of forces - floating particles - waves - imbalance of forces A:
(Answer)
imbalance of forces

Ques: Q: A life cycle continues through reproduction and what? Choices: - response - mechanical - example - development A:
Ans: development

(Q).
Q: Transforming from a caterpillar to a butterfly requires a lot of what? Choices: - Water - fuel - food - energy A:
(A).
energy

Ques:Q: What is the term for physicians and scientists who research and develop vaccines and treat and study conditions ranging from allergies to aids? Choices: - endocrinologists - vaccinologists - virologists - immunologists A:

Ans:immunologists

Question: Q: How many valence electrons does a sodium atom have ? Choices: - three - six - two - one A:
Answer:
one