The SA node, the cardiac center in the medulla oblongata, and the endocrine system
https://quizlet.com/17797282/periodicity-review-flash-cards/
i took a test like this and i went to this site /\ /\ /\ and the flash cards have the answers
Answer:
Explanation:
Sodium mass number 23, 11 electrons
Magnesium: neutrons = 12
aluminum : atomic number = 13
phosporus : protons = 15
Answer:
Both gives hydroxides, but
Calcium reacts with water to give calcium hydroxide Ca(OH)2. this product is slightly soluble in water.
Aluminium is less reactive than Ca, so it reacts with only steam, to give aluminium hydroxide Al(OH)3. This product is insoluble in water.
