Trong giờ ra chơi, A trêu đùa và đánh B gây chảy máu và gãy răng, các bạn trong lớp không ai có ý kiến gì vì sợ A đánh. Trong tình huống này em sẽ làm gì? A.

Báo với cô giáo chủ nhiệm để tìm cách giải quyết.

B.

Mặc kệ vì không liên quan đến mình.

C.

Cùng với A đánh B cho vui.

D.

Chạy đi chỗ khác chơi.

samuel de champlain. in 1608, king henry iv sponsored pierre dugua, sieur de mons and samuel de champlain as founders of the city of quebec with 28 men. this was the second permanent french settlement in the colony of canada.

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

the answer is na (sodium)