Why does H and O share electrons but NA and O transfers electrons

The rules of engagement (roe) working group is often used to (select all that apply.)

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Take a look at this dandelion. the yellow flower on the right is pollinated and the seeds on the left are transported by