Hydrogen bonds are in the family of Van der Waals forces. They are weaker than ionic and covalent bonds but they cause interesting changes with different chemicals. What is one of the changes that hydrogen bonds are responsible for. Question 5 options:

Cause DNA has the double helix shape.

Causes salts quickly dissolve in water.

Cause sugar looks like a crystal.

Cause liquid H2O to have a larger volume than frozen (solid) H2O

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

b) nuclear ive learned that in a pedtrodic table