What is borons atomic number

Which gas will be absorbed by the erythrocytes to the exclusion of oxygen? co2

What reason does john proctor give for his reluctance to regularly attend church? What is another likely reason he hasn't been attending?

Which is a characteristic of a strong base? It turns pink phenolphthalein colorless. It turns blue litmus paper red. It releases H + ions into a solution. It removes H + ions from solution. O O

Dada la configuración electrónica de un elemento 1s2 2s2 2p6 3s2 3p6 3d10 4s1, se puede deducir si tendrá a formar enlaces de tipo: A) Ninguna de las anteriores B) Iónico y covalente C) Metálico y covalente D) Iónico y metálico

A student records the mass of a piece of iron. the iron is then left outside until it rust. what type of reaction occurs. and how does the mass of the object after rusting compare with its original mass

Write the isotope symbol for two isotopes of the same element. What makes the isotopes different? How are they similar?

According to the periodic table, which element has an atomic number of 40? a. u b. ca c. zr d. np

3. Which word best fits with the Earth's day and night cycle a. Revolution b. Rotation C Orbit d. Axis

What causes temperatures in the summer to be higher than temperatures in the winter? A. The greenhouse effect, which raises temperatures on Earth, takes place during the summer months only. B.

What naturally forms an anion?