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rosijanka [135]
3 years ago
5

Approximately how many elements are in the Periodic Table?

Chemistry
2 answers:
lakkis [162]3 years ago
7 0
There are about 118 elements on the periodic table. <span />
babymother [125]3 years ago
5 0

118 elements.

In a periodic table, elements are arranged in increasing order of atomic number. There are 18 groups and 7 periods in the periodic table. On moving left to right in a period, group number increases and on moving top to bottom in a group, period increases. There are approximately 118 elements in the periodic table. The first element is hydrogen (H) with atomic number 1 and 118th element is oganesson (Og) with atomic number 118.


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What impact did the Spanish have on the region of South America?
vichka [17]

Answer:

The Spaniards practically went to war with the native Americans in South America, such as the Inca. They also brought diseases to South America. Diseases like smallpox.

Explanation:

Then after effectively killing off most of the native American population the Spanish continued to use South America for resources and they enslaved most of what was left of the non-Spanish and mixed populations. Francisco Pizarro took a page from Cortes' book, capturing Atahualpa, Emperor of the Inca, in 1532 and Cortes was the conquistador who defeated the Aztec Empire in what is now modern day Mexico or Central America.

4 0
3 years ago
What element has 80 protons, 81 neutrons, 79 electrons?
Mariana [72]

Answer:

The element will be ^{161}_{80}X

Explanation:

Given that,

Number of proton = 80

Number of neutron = 81

Number of electron = 79

We know that,

The atomic number is equal to the number of proton.

So, the atomic number is 80.

According to atomic number,

The element will be mercury.

We need to calculate the atomic mass

Using formula of atomic mass

atomic\ mass=atomic\ number+number\ of\ neutron

Put the value into the formula

atomic\ mass=80+81

atomic\ mass=161

We need to find the element

Using atomic mass and atomic number

atomic\ mass\ number A=161

atomic\ number Z=80

So, the element will be

^{A}_{Z}X

Put the value of A and Z

Hence, The element will be ^{161}_{80}X

5 0
3 years ago
1. In the models, what particles do the colored and plain sesame seeds represent? What particles do the poppy seeds represent
Veronika [31]
Ok the answers to the hole .doc is 
1. Neutrons, Protons, and Electrons
2. N<span>ucleus
3. N</span>eutrons and Protons
4. Electrons
5. Because they represent different things (I would put this in your own words)
6 0
4 years ago
Read 2 more answers
Will mark as Brainliest.
viktelen [127]
B) Bohr's Atomic Model
8 0
3 years ago
One cup of kidney beans contains 15 g of protein, 1 g of fat, and 42 g of carbohydrate. how many kilocalories, to two significan
ollegr [7]
 we need to get the total calories, we can get it by getting the average of calories of the protein, fat, and carbohydrates:
calories of protein = 15g x 4 KCal/g
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calories of fat = 1 g x 9 KCal/g
                        = 9 kCal
calories of carbohydrates = 42 g x 4 KCal/g 
                                            = 168 Kcal
∴ the total calories = 60 + 9 + 168 = 237Kcal = 0.237 Cal
to get the resualt to two significant figures 
∴ the resault is = 0.24 Cal = 240 KCal

4 0
3 years ago
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