---
title: Sodium fizzes violently in water and chlorine is a poisonous gas. Wh… — Elements and the famous members of the… · tree and pragmatics
description: Sodium fizzes violently in water and chlorine is a poisonous gas. Why is table salt safe? Test 6 of lesson 2 «Elements and the famous members of the periodic table» of the chemistry course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's ch
---

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# Test 6 · Elements and the famous members of the periodic table

<!-- .ven lang=en -->
Sodium fizzes violently in water and chlorine is a poisonous gas. Why is table salt safe?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** Sodium, chlorine, table salt · **What happens:** fizz, be · **To what, where:** water, poisonous gas

<!-- .vabout -->
This is test 6 of lesson 2 «Elements and the famous members of the periodic table» of the chemistry course of Mova's primary school. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/chemistry/2-elements-and-the-periodic-table/#t6).

## The question {#question}

<!-- .note -->
*Sentence 1:* Sodium fizzes violently in water and chlorine is a poisonous gas.

```conllu
# sent_id = question:chemistry:2-elements-and-the-periodic-table:t6:1
# text = Sodium fizzes violently in water and chlorine is a poisonous gas.
1	Sodium	sodium	NOUN	NN	Number=Sing	2	nsubj	_	_
2	fizzes	fizz	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	violently	violently	ADV	RB	_	2	advmod	_	_
4	in	in	ADP	IN	_	5	case	_	_
5	water	water	NOUN	NN	Number=Sing	2	obl	_	_
6	and	and	CCONJ	CC	_	11	cc	_	_
7	chlorine	chlorine	NOUN	NN	Number=Sing	11	nsubj	_	_
8	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	11	cop	_	_
9	a	a	DET	DT	Definite=Ind|PronType=Art	11	det	_	_
10	poisonous	poisonous	ADJ	JJ	Degree=Pos	11	amod	_	_
11	gas	gas	NOUN	NN	Number=Sing	5	conj	_	SpaceAfter=No
12	.	.	PUNCT	.	_	2	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **fizz** | present | Sodium |  |  | water and a poisonous gas |  | violently *property* | vn entity\_specific\_modes\_being-47.2 «NP V PP.location»: agent=Theme in water=Location |
| 2 | **is a** | present | chlorine | a poisonous gas |  |  |  |  | tree rules |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

<!-- .note -->
*Sentence 2:* Why is table salt safe?

```conllu
# sent_id = question:chemistry:2-elements-and-the-periodic-table:t6:2
# text = Why is table salt safe?
1	Why	why	ADV	WRB	PronType=Int	5	advmod	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
3	table	table	NOUN	NN	Number=Sing	4	compound	_	_
4	salt	salt	NOUN	NN	Number=Sing	5	nsubj	_	_
5	safe	safe	ADJ	JJ	Degree=Pos	0	root	_	SpaceAfter=No
6	?	?	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | table salt |  |  |  |  | safe *property* | tree rules |

## The options {#options}

### Option 1 · ← Mova's choice · ✓ the right answer {#o1}

<!-- .ven lang=en -->
Joined together they make a new substance with new behaviour

```conllu
# sent_id = question:chemistry:2-elements-and-the-periodic-table:t6:o1:1
# text = Joined together they make a new substance with new behaviour
1	Joined	join	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	4	advcl	_	_
2	together	together	ADV	RB	_	1	advmod	_	_
3	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	4	nsubj	_	_
4	make	make	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
6	new	new	ADJ	JJ	Degree=Pos	7	amod	_	_
7	substance	substance	NOUN	NN	Number=Sing	4	obj	_	_
8	with	with	ADP	IN	_	10	case	_	_
9	new	new	ADJ	JJ	Degree=Pos	10	amod	_	_
10	behaviour	behaviour	NOUN	NN	Number=Sing	7	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **join** | participle | they *not said here* |  |  |  |  | together *property* | vn mix-22.1-2-1 «NP V»: agent=Patient |
| 2 | **make** | present | they | a new substance |  |  |  | with new behaviour | vn build-26.1-1 «NP.asset V NP»: agent=Asset substance=Product |

### Option 2 {#o2}

<!-- .ven lang=en -->
Salt has only a tiny bit of each, too little to hurt

```conllu
# sent_id = question:chemistry:2-elements-and-the-periodic-table:t6:o2:1
# text = Salt has only a tiny bit of each, too little to hurt
1	Salt	salt	NOUN	NN	Number=Sing	2	nsubj	_	_
2	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	only	only	ADV	RB	_	6	advmod	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
5	tiny	tiny	ADJ	JJ	Degree=Pos	6	amod	_	_
6	bit	bit	NOUN	NN	Number=Sing	2	obj	_	_
7	of	of	ADP	IN	_	8	case	_	_
8	each	each	DET	DT	PronType=Tot	6	nmod	_	SpaceAfter=No
9	,	,	PUNCT	,	_	11	punct	_	_
10	too	too	ADV	RB	_	11	advmod	_	_
11	little	little	ADJ	JJ	Degree=Pos	2	conj	_	_
12	to	to	PART	TO	_	13	mark	_	_
13	hurt	hurt	VERB	VB	VerbForm=Inf	11	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | Salt | a tiny bit of each |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent bit=Patient |
| 2 | **hurt** | to-infinitive | a tiny bit of each *not said here* |  |  |  |  |  | vn amuse-31.1 «NP V ADV-Middle»: agent=Experiencer |

### Option 3 {#o3}

<!-- .ven lang=en -->
Salt is not really made of sodium and chlorine

```conllu
# sent_id = question:chemistry:2-elements-and-the-periodic-table:t6:o3:1
# text = Salt is not really made of sodium and chlorine
1	Salt	salt	NOUN	NN	Number=Sing	5	nsubj:pass	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	aux:pass	_	_
3	not	not	PART	RB	Polarity=Neg	5	advmod	_	_
4	really	really	ADV	RB	_	5	advmod	_	_
5	made	make	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
6	of	of	ADP	IN	_	7	case	_	_
7	sodium	sodium	NOUN	NN	Number=Sing	5	obl	_	_
8	and	and	CCONJ	CC	_	9	cc	_	_
9	chlorine	chlorine	NOUN	NN	Number=Sing	7	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **make** | present · passive |  | Salt |  |  |  | of sodium and chlorine | vn build-26.1-1 «NP.asset V NP»: subject=Product |

### Option 4 {#o4}

<!-- .ven lang=en -->
The poison is boiled out in the factory before the salt is packed

```conllu
# sent_id = question:chemistry:2-elements-and-the-periodic-table:t6:o4:1
# text = The poison is boiled out in the factory before the salt is packed
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	poison	poison	NOUN	NN	Number=Sing	4	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	aux:pass	_	_
4	boiled	boil	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
5	out	out	ADP	RP	_	4	compound:prt	_	_
6	in	in	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	factory	factory	NOUN	NN	Number=Sing	4	obl	_	_
9	before	before	SCONJ	IN	_	13	mark	_	_
10	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
11	salt	salt	NOUN	NN	Number=Sing	13	nsubj	_	_
12	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	13	aux:pass	_	_
13	packed	pack	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	4	advcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **boil out** | present · passive |  | the poison |  |  |  | in the factory | vn cooking-45.3 «NP V NP PP.instrument»: subject=Patient in factory=Instrument |
| 2 | **pack** | present · passive |  | the salt |  |  |  |  | vn spray-9.7-1-1 «NP.theme V NP»: subject=Destination |

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

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