Chemistry, 21.06.2019 22:30, shantrice1831

Using the periodic table, complete the table to describe each atom. type in your answers. a ? b? c? d? e? f?

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answered: littledudefromacross

A: 20;B: 40;C: Ca;D: 10;E: 9;F: F.

$\begin{array}{ccccc}\begin{gathered}\text{Number of}\\[-0.5em]\text{Protons}\end{gathered} & \begin{gathered}\text{Number of}\\[-0.5em] \text{Neutrons}\end{gathered} & \begin{gathered}\text{Atomic} \\[-0.5em]\text{Number}\end{gathered} & \begin{gathered}\text{Mass} \\[-0.5em]\text{Number} \end{gathered}& \begin{gathered}\text{Element}\\[-0.5em] \text{(Symbol)}\end{gathered}\\[-0.5em] \multicolumn{5}{c}{\rule{10cm}{0.5pt}}\\20&20&20&40&\text{Ca}\\9&10&9&19&\text{F}\end{array}$

First row:

Number of protons: 20;Number of neutrons: 20;Atomic number: 20;Mass number: 40;Element: Calcium;Symbol: Ca.

Second row:

Number of protons: 9;Number of neutrons: 10;Atomic number: 9;Mass number: 19;Element: Fluorine;Symbol: F;Explanation

The atomic number of an atom is the same as its number of protons. There are 20 protons in the atom in the first row. Its atomic number will be 20.

The mass number of an atom is the sum of its number of protons and its number of neutrons.

There are 20 protons and 20 neutrons in the atom in the first row. What will be its mass number?The mass number of the atom in the second row is 19, meaning that there are 19 protons and neutrons in total in that atom. On top of that, the number of protons in that atom is 9. What will be the number of neutrons in that atom?

Elements on an periodic table are arranged by their atomic number. What's the symbol of the element with atomic number 20? What's the symbol of the element with atomic number 9? The element with atomic number nine is fluorine. The symbol for fluorine is "F", which happens to be the label for that blank.

answered: Guest

shield volcanos are angry and get mad over the smallest things so much that there heads erupt pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its peaceful thing and knows how to control its emotions.

answered: Guest

The answer to your question really depends on three things: how much water you have, how cold it is to start out, and how cold the things around it are. water actually freezes when it gets to 32 degrees fahrenheit (0 degrees celsius), but the time it takes to get there may be different. let's start with the first. if you take two glasses, and fill one with a tiny bit of water, and the other about halfway, then put them both in the freezer, the one with less water will freeze first (you can try this at home, but i recommend using plastic cups and not glass ones). now let's move on to the second part. let's say you have two glasses, and you fill one with really cold water that has been in the refrigerator, and the other with really hot water from the sink. if you put both of them in the freezer, the one that started out colder will freeze first. for the third part, let's imagine that you have two glasses with the same amount of water in them, and the water is at the same temperature. imagine putting one outside on a really really cold day in georgia, and having a friend in alaska put one outside on the same day. since it would be so much colder in alaska, the glass of water there would freeze before yours. so, if you took a tiny bit of really cold water in a glass, and put it outside on a cold day in alaska, it would freeze a lot faster than a big glass of hot water outside on a cold day in georgia.